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A297840型
数字k>0将4*Pi*k^2的接近度设置为整数的新记录。
1
1, 2, 3, 4, 14, 99, 507, 5112, 9361, 13451, 90425, 132640, 268883, 462518, 1803181, 1890795, 2053555, 3831113, 4166332, 5759263, 38574916, 45164470, 310321816, 530684437
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1, 2
评论
整数半径,使相应球体的表面积比任何较小的整数半径更接近整数。
例子
k|4*Pi*k^2|偏离
||整数
------------+---------------------------------------+----------------------
1 | 12.56637061435917... | 0.43362938564082...
2 | 50.26548245743669... | 0.26548245743669...
3 | 113.09733552923255... | 0.09733552923255...
4 | 201.06192982974676... | 0.06192982974676...
14 | 2463.00864041439789... | 0.00864041439789...
99 | 123162.99839133425412... | 0.00160866574587...
507 | 3230173.00005041104861... | 0.00005041104861...
5112 | 328391233.00004811902011... | 0.00004811902011...
9361 | 1101169958.00003281689453... | 0.00003281689453...
13451 | 2273625908.00000716139558... | 0.00000716139558...
90425 | 102751199128.99999628277400... | 0.00000371722599...
132640 | 221084802748.99999692741688... | 0.00000307258311...
268883 | 908524313282.00000157554683... | 0.00000157554683...
462518 | 2688234448369.99999894165289... | 0.00000105834710...
1803181 | 40859072996351.99999911345115... | 0.00000088654884...
1890795 | 44926103614145.99999944953623... | 0.00000055046376...
2053555 | 52993492455840.00000053265439... | 0.00000053265439...
3831113 | 184441985069785.99999958888834... | 0.00000041111165...
4166332 | 218131111695367.00000020961660... | 0.00000020961660...
5759263 | 416815333018180.99999995070232... | 0.00000004929767...
38574916 | 18699062881733779.00000003869142... | 0.00000003869142...
45164470 | 25633251606933903.00000000438530... | 0.00000000438530...
310321816 | 1210136834140739074.00000000262227... | 0.00000000262227...
530684437 | 3539016334684589995.00000000014286... | 0.00000000014286...
数学
mx=1;k=1;lst={};而[k<300000001,a=N[Pi(2k)^2,32];a=N[Abs[a-圆形@a],32];如果[a<mx,mx=a;附加到[lst,k]];k++];第一次(*罗伯特·威尔逊v2018年1月11日*)
黄体脂酮素
(PARI)亲密度(n)=我的(s=4*Pi*n^2);if(round(s)>s,return(rounds(s)-s),returns(s-轮))
我的(r=1,k=1,c=0);而(1,c=紧密度(k);如果(c<r,打印1(k,“,”);r=c);k++)
关键词
非n,坚硬的,更多
扩展
a(23)-a(24)来自乔恩·肖恩菲尔德,2018年1月7日
状态
经核准的