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A131173 Signature permutation of a self-inverse Catalan automorphism: row 7 of A122285 and A122286. 5
0, 1, 2, 3, 4, 5, 6, 8, 7, 9, 10, 11, 12, 13, 14, 15, 19, 21, 22, 16, 20, 17, 18, 23, 24, 25, 27, 26, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 51, 52, 56, 58, 59, 60, 62, 63, 64, 42, 43, 53, 57, 61, 44, 54, 45, 46, 47, 55, 48, 49, 50, 65, 66, 67, 68, 69, 70, 71 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Derived from automorphism *A122282 with recursion scheme SPINE or ENIPS.

LINKS

A. Karttunen, Table of n, a(n) for n = 0..2055

Index entries for signature-permutations of Catalan automorphisms

PROG

(Destructive Scheme implementation of this automorphism, which acts on S-expressions, i.e. list-structures:)

(define (*A131173! s) (cond ((pair? s) (*A069770! (car s)) (if (pair? (cdr s)) (*A131173! (cddr s))))) s)

CROSSREFS

Sequence in context: A089854 A154453 A154454 * A073286 A122312 A130985

Adjacent sequences:  A131170 A131171 A131172 * A131174 A131175 A131176

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jun 20 2007

STATUS

approved

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Last modified January 16 21:37 EST 2019. Contains 319206 sequences. (Running on oeis4.)