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 A177681 #3 Mar 30 2012 18:52:40 %S A177681 3,7,11,13,23,29,31,43,53,79,103,107,109,127,131,137,151,157,167,173, %T A177681 179,181,193,199,211,227,229,233,241,257,311,317,347,349,359,367,373, %U A177681 379,383,431,439,443,461,463,467,479,487,491,499,503,509,523,547,571 %N A177681 Primes p such that abs(A037861(p)) is a prime number. %Y A177681 Cf. A177718, A177796. %K A177681 nonn,base,less %O A177681 1,1 %A A177681 _Juri-Stepan Gerasimov_, May 14 2010 %E A177681 Entries checked, keyword:base,less added and incorrect comment removed by _R. J. Mathar_, May 18 2010