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 A123977 #7 Mar 30 2012 16:50:35 %S A123977 4,5,6,7,8,9,14,15,16,17,18,19,23,24,25,26,27,28,29,32,33,34,35,36,37, %T A123977 38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60, %U A123977 61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86 %N A123977 Complement of A061909 (skinny numbers). %H A123977 <a href="/index/Ca#CARRYLESS">Index entries for sequences related to carryless arithmetic</a> %K A123977 nonn,base %O A123977 1,1 %A A123977 _N. J. A. Sloane_, Jul 29 2010