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 A098669 #3 Mar 30 2012 18:50:47 %S A098669 1,6,10,12,20,26,30,34,38,46,52,58,60,66,68,74,78,82,86,92,102,105, %T A098669 106,114,116,122,130,134,136,142,146,148,156,164,165,166,172,178,186, %U A098669 190,194,202,206,212,218,222,226,228,230,238,244,246,252,262,264,273,274 %N A098669 Numbers of rows ending with ones in triangle A098666. %C A098669 A098668(a(n)) = 1; %C A098669 a(22)=105 is the smallest odd term, 105=3*5*7. %K A098669 nonn %O A098669 1,2 %A A098669 _Reinhard Zumkeller_, Sep 20 2004