1,2

Sequence is a permutation of the natural numbers iff A259565 is a permutation of the odd numbers;

A259565(a(n)) = 2*n-1.

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

(Haskell)

import Data.List (elemIndex); import Data.Maybe (fromJust)

a259570 = (+ 1) . fromJust . (`elemIndex` a259565_list) . subtract 1 . (* 2)

Cf. A259565.

Sequence in context: A107897 A133256 A338500 * A334672 A095690 A094870

Adjacent sequences: A259567 A259568 A259569 * A259571 A259572 A259573

nonn

Reinhard Zumkeller, Jun 30 2015

approved