

A243490


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


6



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, 69, 72, 76, 78, 96, 97, 98, 106, 126, 136, 157, 158, 162, 165, 183, 186, 193, 196, 197, 198, 201, 204, 208, 210, 228, 229, 230, 238, 258, 268, 289, 290, 294, 297, 315
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OFFSET

0,3


COMMENTS

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


LINKS

Antti Karttunen, Table of n, a(n) for n = 0..7059


PROG

(Scheme, with Antti Karttunen's IntSeqlibrary, two variants)
(define A243490 (FIXEDPOINTS 0 0 A069787))
(define A243490 (ZEROPOS 0 0 A243492))


CROSSREFS

Complement: A243489.
Fixed points of A069787, positions of zeros in A243492.
Cf. also A001405, A036256, A061856, A126312, A079442, A243493.
Sequence in context: A318932 A259185 A102471 * A094566 A190018 A217349
Adjacent sequences: A243487 A243488 A243489 * A243491 A243492 A243493


KEYWORD

nonn


AUTHOR

Antti Karttunen, Jun 07 2014


STATUS

approved



