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 A164877 #3 Mar 30 2012 18:52:03 %S A164877 0,12,120,252,240,660,32760,84,8160,14364,6600,3036,65520,156,24360, %T A164877 429660,16320,204,69090840,228,541200,75852,30360,12972,2227680,3300, %U A164877 82680,43092,48720,20532,3407203800,372,32640,4271652,2040,328020,10087262640 %N A164877 First bisection of A164869. %C A164877 All entries are multiples of 12. %C A164877 a(n) = A006953(n) * A111008(n), n>0. %F A164877 a(n) = A164869(2n). %F A164877 a(n) = A002445(n) * A005843(n). %K A164877 nonn %O A164877 0,2 %A A164877 _Paul Curtz_, Aug 29 2009 %E A164877 Edited and extended by _R. J. Mathar_, Sep 03 2009