1,3

Note the indexing: Domain starts from 1, range from 0.

Antti Karttunen, Table of n, a(n) for n = 1..1024

Index entries for sequences that are permutations of the natural numbers

a(1) = 0, a(2) = 1, a(2n) = 2*a(n), a(2n+1) = 1 + 2*a(A269370(2n+1)).

As a composition of related permutations:

a(n) = A269386(A260741(n)).

(Scheme, with memoization-macro definec)

(definec (A269376 n) (cond ((<= n 2) (- n 1)) ((even? n) (* 2 (A269376 (/ n 2)))) (else (+ 1 (* 2 (A269376 (A269370 n)))))))

Inverse: A269375.

Cf. A269370.

Related permutation: A269378.

Cf. also A252756, A269386.

Sequence in context: A250090 A154437 A305428 * A257793 A083236 A302717

Adjacent sequences: A269373 A269374 A269375 * A269377 A269378 A269379

nonn

Antti Karttunen, Mar 01 2016

approved