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 A226628 #7 Jun 15 2013 01:27:37 %S A226628 1,4,5,7,8,16,17,18,19,20,23,24,25,27,28,31,32,34,39,74,76,77,79,80, %T A226628 86,95,231,232,233,237,239,240,241,257,260,268,276,277,286,287,289, %U A226628 290,306,313,322,323,324,325,351,372,385,388,392,395,397,399,437 %N A226628 Index of the first element of row n of A226623. %H A226628 Geoffrey H. Morley, <a href="/A226628/b226628.txt">Table of n, a(n) for n = 1..600</a> %Y A226628 a(n) is also the index of the first element of row n in A226624 to A226627. %Y A226628 Cf. A226612, A226629, A226631, A226632. %K A226628 nonn %O A226628 1,2 %A A226628 _Geoffrey H. Morley_, Jun 13 2013