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 A152415 #3 Apr 04 2015 10:01:58 %S A152415 2,4,6,10,15,21,26,33,40,50,57,69,79,93,106,116,129,145,158,172,193, %T A152415 212,232,254,277,298,320,340,367,397,420,443,474,501,534,562,593,629, %U A152415 666,692,727,760,795,833,869,901,937,980,1029,1071,1115,1160,1209,1249,1299 %N A152415 a(n) = A166709(n) + 1. %C A152415 This takes the empty sum into account. Suggested by _M. F. Hasler_. %K A152415 nonn %O A152415 1,1 %A A152415 _N. J. A. Sloane_, Oct 24 2009