0,3

This is the unique Catalan automorphism f, such that *A120705 = (KROF f). See A122202 for the definition of KROF.

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

Index entries for signature-permutations of Catalan automorphisms

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

(define (*A130926! s) (cond ((pair? s) (*A120706! (cdr s)) (*A120706! (car s)) (*A120705! s))) s)

Inverse: A130925. Cf. A130923 & A130924.

Sequence in context: A122324 A074688 A130998 * A069774 A089861 A072092

Adjacent sequences: A130923 A130924 A130925 * A130927 A130928 A130929

nonn

Antti Karttunen, Jun 11 2007

approved