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 A187842 #4 Mar 30 2012 18:57:19 %S A187842 2,4,6,9,11,13,15,18,20,22,24,27,29,32,33,36,38,40,43,45,47,49,52,54, %T A187842 56,58,61,63,65,67,70,72,75,76,79,81,84,86,88,90,92,94,97,99,101,104, %U A187842 106,108,110,113,115,118,120,122,124,127,129,131,133,136,138,140,142,144,147,149,151,153,156,158,160,162,165,167,170 %N A187842 Complement of A187841. %C A187842 See A187224. %t A187842 (See A187841.) %Y A187842 Cf. A187224, A187841, A187839, A187840. %K A187842 nonn %O A187842 1,1 %A A187842 _Clark Kimberling_, Mar 13 2011