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 A243490 #17 Jul 21 2014 03:41:18 %S A243490 0,1,2,3,4,5,8,9,10,13,16,20,22,23,24,27,30,34,36,54,55,56,64,65,66, %T A243490 69,72,76,78,96,97,98,106,126,136,157,158,162,165,183,186,193,196,197, %U A243490 198,201,204,208,210,228,229,230,238,258,268,289,290,294,297,315 %N A243490 Fixed points of A069787: Numbers n such that A069787(n) = n. %C A243490 Although in principle a list, the indexing of this sequence starts from zero, as 0 is always fixed by all Catalan bijections (permutations induced by bijective operations performed on A014486), so it is a trivial case, which can be skipped by considering only values from a(n>=1) onward. %C A243490 Sequence gives also the positions of all zeros in A243492. %H A243490 Antti Karttunen, <a href="/A243490/b243490.txt">Table of n, a(n) for n = 0..7059</a> %o A243490 (Scheme, with _Antti Karttunen_'s IntSeq-library, two variants) %o A243490 (define A243490 (FIXED-POINTS 0 0 A069787)) %o A243490 (define A243490 (ZERO-POS 0 0 A243492)) %Y A243490 Complement: A243489. %Y A243490 Fixed points of A069787, positions of zeros in A243492. %Y A243490 Cf. also A001405, A036256, A061856, A126312, A079442, A243493. %K A243490 nonn %O A243490 0,3 %A A243490 _Antti Karttunen_, Jun 07 2014