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 A217083 #15 Feb 17 2017 17:00:35 %S A217083 46,122,238,304,314,315,328,332,346,372,382,426,440,491,496,510,524, %T A217083 528,566,638,733,826,1016,1054,1071,1214,1309,1338,1388,1401,1457, %U A217083 1512,1536,1582,1624,1718,1773,1814,1816,1825,1952,1985,2021,2072,2308,2349,2449,2481 %N A217083 Numbers n such that (n^67-1)/(n-1) is prime. %H A217083 Vincenzo Librandi, <a href="/A217083/b217083.txt">Table of n, a(n) for n = 1..1000</a> %t A217083 Select[Range[2, 2500], PrimeQ[(#^67 - 1)/(# - 1)] &] (* _T. D. Noe_, Sep 26 2012 *) %o A217083 (PARI) is(n)=isprime((n^67-1)/(n-1)) \\ _Charles R Greathouse IV_, Feb 17 2017 %Y A217083 Cf. A002384, A049409, A100330, A162862, A217070-A217089. %K A217083 nonn,easy %O A217083 1,1 %A A217083 _Tim Johannes Ohrtmann_, Sep 26 2012 %E A217083 More terms from _T. D. Noe_, Sep 26 2012