0,3

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 (*A130371! s) (if (odd? (length s)) (*A074685! (car (last-pair s)))) s)

Inverse: A130372. a(n) = A130370(A074685(n)) = A074686(A130375(A074685(n))) = A130370(A130375(A130369(n))).

Sequence in context: A030555 A100708 A222252 * A130372 A089865 A089866

Adjacent sequences: A130368 A130369 A130370 * A130372 A130373 A130374

nonn

Antti Karttunen, Jun 05 2007

approved