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 A244222 #12 Jul 16 2017 14:45:38 %S A244222 0,2,4,5,7,9,10,12,14,16,18,19,21,23,24,26,28,30,32,33,35,37,38,40,42, %T A244222 44,46,47,49,51,52,54,56,58,60,61,63,65,66,68,70,72,74,75,77,79,80,82, %U A244222 84,86,88,89,91,93,94,96,98,100,102,103,105,107,108,110,112,114,116,117,119,121,122,124,126,128,130,131,132 %N A244222 Numbers k which have even representation in Greedy Catalan Base, i.e., where A014418(k) ends with zero. %C A244222 A244229 works as an inverse function for this injection. We have A244229(a(n)) = n for all n. %H A244222 Antti Karttunen, <a href="/A244222/b244222.txt">Table of n, a(n) for n = 0..9679</a> %o A244222 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A244222 (define A244222 (ZERO-POS 0 0 A244221)) %Y A244222 Complement: A244223. %Y A244222 Characteristic function: A244220. %Y A244222 Cf. A244221, A244229, A014418, A244161. %K A244222 nonn %O A244222 0,2 %A A244222 _Antti Karttunen_, Jun 23 2014