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 *A130376! (!APPLY-AFTER-FIRST-NIL *A074686!))

(define (!APPLY-AFTER-FIRST-NIL f!) (letrec ((g! (lambda (s) (cond ((pair? s) (if (pair? (car s)) (g! (cdr s)) (f! (cdr s))))) s))) g!))

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

Sequence in context: A130341 A130944 A122341 * A130342 A130943 A122342

Adjacent sequences: A130373 A130374 A130375 * A130377 A130378 A130379

nonn

Antti Karttunen, Jun 05 2007

approved