This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A217077 #14 Sep 08 2022 08:46:04 %S A217077 14,53,55,58,71,76,82,211,248,271,296,316,430,433,439,472,545,553,555, %T A217077 596,663,677,682,746,814,832,885,926,947,959,1048,1121,1146,1175,1207, %U A217077 1300,1302,1390,1404,1445,1466,1541,1650,1699,1702,1706,1756,1757,1782,1902 %N A217077 Numbers n such that (n^41-1)/(n-1) is prime. %H A217077 Vincenzo Librandi, <a href="/A217077/b217077.txt">Table of n, a(n) for n = 1..1000</a> %t A217077 Select[Range[2, 2000], PrimeQ[(#^41 - 1)/(# - 1)] &] (* _T. D. Noe_, Sep 26 2012 *) %o A217077 (Magma) [n: n in [2..2000] |IsPrime((n^41 - 1) div (n - 1))]; // _Vincenzo Librandi_, Sep 28 2012 %o A217077 (PARI) is(n)=isprime((n^41-1)/(n-1)) \\ _Charles R Greathouse IV_, Feb 17 2017 %Y A217077 Cf. A002384, A049409, A100330, A162862, A217070-A217089. %K A217077 nonn,easy %O A217077 1,1 %A A217077 _Tim Johannes Ohrtmann_, Sep 26 2012 %E A217077 More terms from _T. D. Noe_, Sep 26 2012