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 A217080 #17 Sep 08 2022 08:46:04 %S A217080 24,45,60,165,235,272,285,298,307,381,416,429,623,799,858,924,929,936, %T A217080 1034,1067,1076,1130,1223,1243,1327,1488,1592,1594,1659,1673,1676, %U A217080 1678,1762,1873,1917,1928,1997,2110,2117,2141,2166,2231,2243,2293,2338,2380,2420 %N A217080 Numbers n such that (n^53-1)/(n-1) is prime. %H A217080 Vincenzo Librandi, <a href="/A217080/b217080.txt">Table of n, a(n) for n = 1..1000</a> %t A217080 Select[Range[2, 2500], PrimeQ[(#^53 - 1)/(# - 1)] &] (* _T. D. Noe_, Sep 26 2012 *) %o A217080 (Magma) [n: n in [2..2450] |IsPrime((n^53 - 1) div (n - 1))]; // _Vincenzo Librandi_, Sep 28 2012 %o A217080 (PARI) is(n)=isprime((n^53-1)/(n-1)) \\ _Charles R Greathouse IV_, Feb 17 2017 %Y A217080 Cf. A002384, A049409, A100330, A162862, A217070-A217089. %K A217080 nonn %O A217080 1,1 %A A217080 _Tim Johannes Ohrtmann_, Sep 26 2012 %E A217080 More terms from _T. D. Noe_, Sep 26 2012