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 A036227 #8 May 11 2014 14:09:30 %S A036227 20,22,26,34,41,46,56,67,80,88,104,109,119,130,134,142,149,163,173, %T A036227 184,197,214,221,226,236,247,260,268,284,298,317,328,341,349,365,379, %U A036227 398,418,431,439,455,469,488,508,521,529,545,559,578,598,620,628,644,658 %N A036227 a(1) = 20; a(n+1) = a(n) + sum of decimal digits of a(n). %C A036227 elements >= 109 can be found in A007618. %H A036227 <a href="/index/Coi#Colombian">Index entries for Colombian or self numbers and related sequences</a> %t A036227 NestList[#+Total[IntegerDigits[#]]&,20,60] (* _Harvey P. Dale_, May 11 2014 *) %Y A036227 Cf. A004207, A016052, A007618, A006507, A016052. %K A036227 easy,nonn,base %O A036227 1,1 %A A036227 Miklos SZABO (mike(AT)ludens.elte.hu) %E A036227 Edited by _Charles R Greathouse IV_, Aug 02 2010