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 A244223 #12 Jul 16 2017 14:44:38 %S A244223 1,3,6,8,11,13,15,17,20,22,25,27,29,31,34,36,39,41,43,45,48,50,53,55, %T A244223 57,59,62,64,67,69,71,73,76,78,81,83,85,87,90,92,95,97,99,101,104,106, %U A244223 109,111,113,115,118,120,123,125,127,129,133,135,138,140,143,145,147,149 %N A244223 Numbers k which have an odd representation in Greedy Catalan Base, i.e., where A014418(k) ends with digit one. %C A244223 A244225 works as an inverse function for this injection. We have A244225(a(n)) = n for all n >= 1. %H A244223 Antti Karttunen, <a href="/A244223/b244223.txt">Table of n, a(n) for n = 1..7118</a> %o A244223 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A244223 (define A244223 (NONZERO-POS 1 1 A244221)) %Y A244223 Complement: A244222. %Y A244223 Characteristic function: A244221. %Y A244223 First differences: A244228. %Y A244223 Cf. A014418, A244161, A244225, A244227. %K A244223 nonn %O A244223 1,2 %A A244223 _Antti Karttunen_, Jun 23 2014