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 A161425 #5 Mar 30 2012 17:40:00 %S A161425 8,10,12,14,16,22,26,34,38,46,58,62,74,82,86,94,106,118,122,134,142, %T A161425 146,158,166,178,194,202,206,214,218,226,254,262,274,278,298,302,314, %U A161425 326,334,346,358,362,382,386,394,398,422,446,454,458,466,478,482,502,514 %N A161425 a(n) = A161424(n)/2. %Y A161425 Cf. A018253, A160811, A160812, A161205, A161344, A161345, A161346, A161424, A161428. %K A161425 easy,nonn %O A161425 1,1 %A A161425 _Omar E. Pol_, Jun 20 2009 %E A161425 Terms beyond a(8) from _R. J. Mathar_, Jun 24 2009