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 A098734 #4 Mar 31 2012 14:11:36
%S A098734 0,2,6,12,20,30,42,56,72,90,11,0,13,14,15,32,17,54,19,80,21,110,23,
%T A098734 144,25,182,27,224,29,270,62,0,66,34,70,72,74,114,78,160,82,210,86,
%U A098734 264,90,322,94,384,98,450,153,0,159,54,165,112,171,174,177,240,183,310,189,384
%N A098734 Consider the sequence {b(n), n >= 1} of digits of the integers: 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0... (A033307); a(n) = n*b(n).
%Y A098734 Cf. A098727, etc.
%K A098734 base,easy,nonn
%O A098734 1,2
%A A098734 _Alexandre Wajnberg_, Sep 30 2004
%E A098734 More terms from _Emeric Deutsch_, Jul 13 2005