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 A102045 #4 Oct 03 2013 09:31:26 %S A102045 1,5,16,25,36,38,47,49,57,59,71,81,93,103,119,133,140,148,155,171,183, %T A102045 189,196,200,204,229,231,235,251,255,277,287,291,298,308,315,319,335, %U A102045 339,347,351,363,367,384,388,396,409,417,426,430,450,466,470,490,494 %N A102045 Aronsonian sequence generated by the sentence, "H is the first, fifth, sixteenth, twenty-fifth, thirty-sixth, thirty-eighth, forty-seventh, ... letter in this sentence.". %C A102045 This version counts hyphens, A055508 does not. %e A102045 a(3) = 16 because the third H in "H is the first, fifth, ... letter in this sentence." is its 16th letter. %Y A102045 Cf. A005224. %K A102045 easy,nonn,word %O A102045 1,2 %A A102045 _Michael Joseph Halm_, Feb 12 2005