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 A036231 #4 Nov 13 2010 11:30:39 %S A036231 121,125,133,140,145,155,166,179,196,212,217,227,238,251,259,275,289, %T A036231 308,319,332,340,347,361,371,382,395,412,419,433,443,454,467,484,500, %U A036231 505,515,526,539,556,572,586,605,616,629,646,662,676,695,715,728,745 %N A036231 a(n+1) = a(n) + sum of digits of a(n) starting with 121. %C A036231 Elements >= 1003 can be found in A004207. %Y A036231 Cf. A004207, A016052, A007618, A006507, A016052. %K A036231 nonn,base,easy %O A036231 1,1 %A A036231 Miklos SZABO (mike(AT)ludens.elte.hu)