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 A176682 #7 Feb 27 2020 12:20:06 %S A176682 6,12,18,36,48,60,66,132,138,162,186,192,216,228,270,330,360,366,408, %T A176682 468,474,582,606,642,678,708,744,792,1086,1182,1236,1308,1326,1458, %U A176682 1524,1686,1782,1902,1998,2040,2124,2178,2208,2244,2358,2370,2634,2658,2760 %N A176682 Numbers k such that k^2 +-7 are primes. %H A176682 Daniel Starodubtsev, <a href="/A176682/b176682.txt">Table of n, a(n) for n = 1..10000</a> %e A176682 12 is in the sequence, because 12^2 - 7 = 137 and 12^2 + 7 = 151 are primes. %t A176682 Select[Range[8! ],PrimeQ[ #^2-7]&&PrimeQ[ #^2+7]&] %Y A176682 Cf. A097698, A108701, A176681 %K A176682 nonn %O A176682 1,1 %A A176682 _Vladimir Joseph Stephan Orlovsky_, Apr 23 2010