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 A176551 #3 Mar 30 2012 18:52:40 %S A176551 4,10,14,22,25,26,34,35,38,46,49,55,58,62,65,74,77,82,85,86,91,94,95, %T A176551 106,115,118,119,121,122,133,134,142,143,145,146,155,158,161,166,169, %U A176551 178,185,187,194,202,203,205,206,209,214,215,217,218,221,226,235,247 %N A176551 Products of 2 primes of the form 3*k-+1. %C A176551 Semiprimes without 3*primes (or triple the primes). %C A176551 Numbers of the form A045344(i)*A045344(j), any i, j. [From _R. J. Mathar_, Apr 27 2010] %Y A176551 Cf. A001358, A001748, A100959. %K A176551 nonn %O A176551 1,1 %A A176551 _Juri-Stepan Gerasimov_, Apr 20 2010 %E A176551 Entries checked by _R. J. Mathar_, Apr 27 2010