显示找到的7个结果中的1-7个。
第页1
交换4k+1和4k+3素数位置的完全乘法对合:a(1)=1;a(素数(k))=A267101型(k) ,对于x,y>1,a(x*y)=a(x)*a(y)。
+20 32
1, 2, 5, 4, 3, 10, 13, 8, 25, 6, 17, 20, 7, 26, 15, 16, 11, 50, 29, 12, 65, 34, 37, 40, 9, 14, 125, 52, 19, 30, 41, 32, 85, 22, 39, 100, 23, 58, 35, 24, 31, 130, 53, 68, 75, 74, 61, 80, 169, 18, 55, 28, 43, 250, 51, 104, 145, 38, 73, 60, 47, 82, 325, 64, 21, 170, 89, 44, 185, 78, 97, 200, 59, 46, 45, 116, 221, 70, 101
评论
词汇学上最早的自然数自反置换,其中形式4k+1的每个质数都被形式4k+3的质数替换,反之亦然,复合数由乘数决定。
配方奶粉
其他身份。对于所有n>=1:
a(2*n)=2*a(n)。
a(3*n)=5*a(n)。
a(5*n)=3*a(n)。
a(7*n)=13*a(n)。
a(11*n)=17*a(n)。
黄体脂酮素
(PARI)
up_to=2^16;
A267097list(up_to)={my(v=向量(up_tto),i=0,c=0);对于素数(p=2,素数(up_to),如果(1==(p%4),c++);i++;v[i]=c);(v);};
v267097=A267097列表(up_to);
list_primes_of_the_form(up_to,m,k)={my(v=向量(up_to),i=0);对于素数(p=2,如果(k==(p%m),i++;v[i]=p;如果(i==up_to、return(v)));};
v002144=列表primes_of_the_form(2*up_to,4,1);
v002145=列表primes_of_the_form(2*up_to,4,3);
(方案,带有备忘录-宏定义)
在词汇学上,素数的最早排列,对于n>1,形式为4*k+1和4*k+3交替。
+10 19
2, 3, 5, 7, 13, 11, 17, 19, 29, 23, 37, 31, 41, 43, 53, 47, 61, 59, 73, 67, 89, 71, 97, 79, 101, 83, 109, 103, 113, 107, 137, 127, 149, 131, 157, 139, 173, 151, 181, 163, 193, 167, 197, 179, 229, 191, 233, 199, 241, 211, 257, 223, 269, 227, 277, 239, 281, 251, 293
配方奶粉
当n>1时,a(n)mod 4=3-2*(n mod 2)。
(结束)
黄体脂酮素
(哈斯克尔)
导入数据。列表(转置)
a108546 n=a108546_列表!!(n-1)
a108546_list=2:连接
(转置[a002145_list,a002144_list])
(PARI)
up_to=10000;
A108546list(up_to)={my(v=向量(up_tto),p,q);v[1]=2;v[2]=3;v[3]=5;对于(n=4,up_to,p=v[n-2];q=下一素数(1+p);while(q%4!=p%4,q=下一素数(1+q));v[n]=q);(v);};
v108546=A108546列表(up_to);
1, 1, 4, 2, 2, 4, 12, 4, 20, 2, 16, 8, 6, 12, 8, 8, 10, 20, 28, 4, 48, 16, 36, 16, 6, 6, 100, 24, 18, 8, 40, 16, 64, 10, 24, 40, 22, 28, 24, 8, 30, 48, 52, 32, 40, 36, 60, 32, 156, 6, 40, 12, 42, 100, 32, 48, 112, 18, 72, 16, 46, 40, 240, 32, 12, 64, 88, 20, 144, 24, 96, 80, 58, 22, 24, 56, 192, 24, 100, 16, 500
配方奶粉
对于所有n>=0,a(4n+2)=a(2n+1)。
0, 0, 1, 1, 1, 2, 3, 3, 3, 4, 4, 5, 6, 6, 6, 7, 7, 8, 8, 8, 9, 9, 9, 10, 11, 12, 12, 12, 13, 14, 14, 14, 15, 15, 16, 16, 17, 17, 17, 18, 18, 19, 19, 20, 21, 21, 21, 21, 21, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 28, 28, 29, 29, 29, 30, 31, 31, 32, 32, 33, 34, 34, 34, 35, 35, 35, 36, 37, 38, 39, 39, 40, 40, 41
0, 1, 1, 2, 3, 3, 3, 4, 5, 5, 6, 6, 6, 7, 8, 8, 9, 9, 10, 11, 11, 12, 13, 13, 13, 13, 14, 15, 15, 15, 16, 17, 17, 18, 18, 19, 19, 20, 21, 21, 22, 22, 23, 23, 23, 24, 25, 26, 27, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 31, 32, 32, 33, 34, 34, 34, 35, 35, 36, 36, 36, 37, 38, 38, 39, 40, 40, 40, 40, 40, 41, 41, 42
数学
累加[Table[If[IntegerQ[(n-3)/4],1,0],{n,Prime[Range[90]]}](*哈维·P·戴尔2018年3月7日*)
1, 3, 2, 6, 7, 4, 5, 10, 12, 8, 13, 9, 11, 16, 18, 14, 21, 15, 24, 25, 17, 26, 29, 19, 20, 22, 30, 33, 23, 27, 35, 37, 28, 40, 31, 42, 32, 44, 45, 34, 50, 36, 51, 38, 39, 53, 55, 57, 59, 41, 43, 60, 46, 62, 47, 65, 48, 66, 49, 52, 68, 54, 70, 71, 56, 58, 74, 61, 77, 63, 64, 78, 79, 67, 80, 82, 69, 72, 73, 75, 84, 76, 87, 81
1, -1, -4, -1, -2, 4, -12, -1, -4, 2, -16, 4, -6, 12, 8, -1, -10, 4, -28, 2, 48, 16, -36, 4, -2, 6, -4, 12, -18, -8, -40, -1, 64, 10, 24, 4, -22, 28, 24, 2, -30, -48, -52, 16, 8, 36, -60, 4, -12, 2, 40, 6, -42, 4, 32, 12, 112, 18, -72, -8, -46, 40, 48, -1, 12, -64, -88, 10, 144, -24, -96, 4, -58, 22, 8, 28, 192, -24
配方奶粉
a(1)=1,对于n>1,a(n)=-和{d|n,d<n}A354102型(n/d)*a(d)。
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