来自在线整数百科全书的问候语!http://oeis.org/ Search: id:a047981 Showing 1-1 of 1 %I A047981 %S A047981 3,7,17,71,19,59,167,757,197,159,799,227,317,415,361,521,3289,2633, %T A047981 1637,1861,1691,1997,2053,4097,6437,5731,9199,11603,5641,3833,26885, %U A047981 6637,26815,32117,18637,29933,31667,5227,19891,47303,54973,5207,59537 %N A047981 a(n) = A047980(2n). %H A047981算术级数中与素数相关的序列的索引项%F A047 98a(n)=min {k}:a034 693a(a(n))是偶数,使得在(n)*k+1级数中,第一素数出现在偶数2n=k位置。εe e a047 98a第一实例:a(1)=3,因为在3k+1序列中,第一项是3,素数和d=2是最小的这种差值。下一个这样的级数是5k+ 1,因为5×2+1=11是素数。第二个例子:这里n=6 A(6)=59。这意味着2n=12首先出现在A034 696在其位置59,这意味着它的第一素数是12×59 + 1=709。作为第十二项出现(此类进展是:59k+1,85 k+1133K+1等).0%94080,A047 982A034 693A034 782-A034 784.0%K A047 981ON07981A047 9811,1%A047 981LaBOS EELMELYL的内容在OEIS最终用户许可协议下可用:HTTP:/OEIS.Org/许可证