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 A217086 #14 Feb 17 2017 17:06:24 %S A217086 22,112,140,158,170,254,271,330,334,354,390,483,528,560,565,714,850, %T A217086 888,924,929,933,935,970,1019,1047,1141,1266,1338,1359,1376,1412,1485, %U A217086 1504,1542,1598,1607,1618,1747,1773,1814,1843,2087,2088,2100,2167,2186,2233,2311 %N A217086 Numbers n such that (n^79-1)/(n-1) is prime. %H A217086 Vincenzo Librandi, <a href="/A217086/b217086.txt">Table of n, a(n) for n = 1..500</a> %t A217086 Select[Range[2, 1000], PrimeQ[(#^79 - 1)/(# - 1)] &] (* _T. D. Noe_, Sep 26 2012 *) %o A217086 (PARI) is(n)=isprime((n^79-1)/(n-1)) \\ _Charles R Greathouse IV_, Feb 17 2017 %Y A217086 Cf. A002384, A049409, A100330, A162862, A217070-A217089. %K A217086 nonn %O A217086 1,1 %A A217086 _Tim Johannes Ohrtmann_, Sep 26 2012 %E A217086 More terms from _T. D. Noe_, Sep 26 2012