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 A217087 #15 Feb 17 2017 17:06:23 %S A217087 41,146,386,593,667,688,906,927,930,1025,1032,1111,1410,1437,1638, %T A217087 1829,1960,2045,2381,2384,2618,2807,2909,3059,3164,3268,3370,3783, %U A217087 3861,4043,4054,4198,4284,4539,4934,4968,4992,5009,5047,5049,5111,5217,5237,5342,5367 %N A217087 Numbers n such that (n^83-1)/(n-1) is prime. %H A217087 Vincenzo Librandi, <a href="/A217087/b217087.txt">Table of n, a(n) for n = 1..300</a> %t A217087 Select[Range[2, 1000], PrimeQ[(#^83 - 1)/(# - 1)] &] (* _T. D. Noe_, Sep 26 2012 *) %o A217087 (PARI) is(n)=isprime((n^83-1)/(n-1)) \\ _Charles R Greathouse IV_, Feb 17 2017 %Y A217087 Cf. A002384, A049409, A100330, A162862, A217070-A217089. %K A217087 nonn %O A217087 1,1 %A A217087 _Tim Johannes Ohrtmann_, Sep 26 2012 %E A217087 More terms from _T. D. Noe_, Sep 26 2012