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 A176681 #7 Feb 27 2020 12:18:23 %S A176681 6,12,36,72,78,168,198,204,342,432,456,492,534,588,594,666,726,756, %T A176681 786,804,996,1014,1212,1218,1248,1254,1266,1314,1344,1476,1512,1554, %U A176681 1806,1812,1902,2088,2298,2322,2364,2616,2634,3066,3072,3162,3432,3444,3852 %N A176681 Numbers k such that k^2 +-5 are primes. %H A176681 Daniel Starodubtsev, <a href="/A176681/b176681.txt">Table of n, a(n) for n = 1..10000</a> %e A176681 12 is in the sequence, because 12^2 + 5 = 149 and 12^2 - 5 = 139 are primes. %t A176681 Select[Range[8! ],PrimeQ[ #^2-5]&&PrimeQ[ #^2+5]&] %Y A176681 Cf. A097698, A108701 %K A176681 nonn %O A176681 1,1 %A A176681 _Vladimir Joseph Stephan Orlovsky_, Apr 23 2010