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 A154787 #2 Mar 30 2012 17:33:59 %S A154787 0,0,0,4,5,6,7,16,18,20,22,36,26,28,45,32,51,72,19,60,84,66,69,120, %T A154787 100,78,135,84,87,180,62,160,198,68,175,216,148,190,273,160,164,336, %U A154787 172,176,405,184,188,336,147,300,408,260,265,432,330,392,570 %N A154787 a(n) = A061357(n)*n = A154786(n)/2. %Y A154787 Cf. A061357, A154720, A154724, A154725, A154726, A154786. %K A154787 nonn %O A154787 1,4 %A A154787 _Omar E. Pol_, Jan 20 2009