A243490 - OEIS

%I #17 Jul 21 2014 03:41:18

%S 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 69,72,76,78,96,97,98,106,126,136,157,158,162,165,183,186,193,196,197,

%U 198,201,204,208,210,228,229,230,238,258,268,289,290,294,297,315

%N Fixed points of A069787: Numbers n such that A069787(n) = n.

%C 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 Sequence gives also the positions of all zeros in A243492.

%H Antti Karttunen, <a href="/A243490/b243490.txt">Table of n, a(n) for n = 0..7059</a>

%o (Scheme, with _Antti Karttunen_'s IntSeq-library, two variants)

%o (define A243490 (FIXED-POINTS 0 0 A069787))

%o (define A243490 (ZERO-POS 0 0 A243492))

%Y Complement: A243489.

%Y Fixed points of A069787, positions of zeros in A243492.

%Y Cf. also A001405, A036256, A061856, A126312, A079442, A243493.

%K nonn

%O 0,3

%A _Antti Karttunen_, Jun 07 2014