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 A169968 #4 Mar 30 2012 16:51:46 %S A169968 1,3,7,9,10,11,12,13,14,15,16,17,18,19,21,23,25,27,29,30,31,32,33,34, %T A169968 35,36,37,38,39,41,43,45,47,49,51,52,53,54,56,57,58,59,61,63,65,67,69, %U A169968 70,71,72,73,74,75,76,77,78,79,81,83,85,87,89,90,91,92,93,94,95,96,97,98,99,100 %N A169968 Positive integers not in A169884. %C A169968 Positive numbers that are not zero divisors in carryless arithmetic mod 10. %H A169968 <a href="/index/Ca#CARRYLESS">Index entries for sequences related to carryless arithmetic</a> %K A169968 nonn,base %O A169968 1,2 %A A169968 _N. J. A. Sloane_, Aug 07 2010