0,3

Table of n, a(n) for n=0..69.

A. Karttunen, Gatomorphisms (with the complete Scheme source)

Index entries for sequences that are permutations of the natural numbers

(Scheme function implementing this automorphism on list-structures:)

(define (gmA074687! s) (cond ((pair? s) (gmA074687! (car s)) (gmrobl! s) (gmA074687! (cdr s)))) s)

Inverse of A074688 and also a(n) = A057163(A074688(A057163(n))). Cf. A074681-A074690. Occurs in A073200 as row 5572440.

Sequence in context: A123495 A130369 A072091 * A130366 A130934 A130965

Adjacent sequences: A074684 A074685 A074686 * A074688 A074689 A074690

nonn

Antti Karttunen, Sep 11 2002

approved