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 A217084 #16 Feb 17 2017 17:00:35 %S A217084 3,6,17,24,37,89,132,374,387,402,421,435,453,464,490,516,708,736,919, %T A217084 947,981,1033,1067,1170,1195,1253,1284,1349,1385,1409,1479,1709,1724, %U A217084 1726,1735,1875,1950,1984,2012,2070,2124,2133,2161,2194,2424,2432,2459,2531,2552 %N A217084 Numbers n such that (n^71-1)/(n-1) is prime. %H A217084 Vincenzo Librandi, <a href="/A217084/b217084.txt">Table of n, a(n) for n = 1..1000</a> %t A217084 Select[Range[2, 1000], PrimeQ[(#^71 - 1)/(# - 1)] &] (* _T. D. Noe_, Sep 26 2012 *) %o A217084 (PARI) is(n)=isprime((n^71-1)/(n-1)) \\ _Charles R Greathouse IV_, Feb 17 2017 %Y A217084 Cf. A002384, A049409, A100330, A162862, A217070-A217089. %K A217084 nonn %O A217084 1,1 %A A217084 _Tim Johannes Ohrtmann_, Sep 26 2012 %E A217084 More terms from _T. D. Noe_, Sep 26 2012