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 A225521 #20 Feb 11 2020 10:02:08
%S A225521 3,6,11,15,19,22,27,32,36,39,43,48,52
%N A225521 Cumulative number of letters in first n English names of playing card denominations: ace, two, three, ... jack, queen, king.
%C A225521 Differs from A067278 at 11th value, because, though Letters("one") = Letters("ace") = 3, Letters("eleven") != Letters("jack"). Note the nice coincidence that a(13) = 52, the number of cards in a standard deck of cards.
%D A225521 Brad Meltzer, Dead Even, first Warner Books printing, March 1999, p. 15.
%e A225521 a(11) = a(10) + the number of letters in "jack" = 39 + 4 = 43.
%Y A225521 Cf. A005589, A067278.
%K A225521 nonn,word,fini,full,less
%O A225521 1,1
%A A225521 _Jonathan Vos Post_, May 09 2013