A212439 - OEIS

A212439

a(n) = 2*n + A181935(n) mod 2.

1, 3, 5, 6, 8, 11, 13, 15, 17, 19, 20, 22, 24, 27, 29, 30, 32, 35, 37, 38, 40, 42, 45, 47, 49, 51, 52, 54, 56, 59, 61, 63, 65, 67, 69, 70, 72, 74, 77, 79, 81, 83, 85, 86, 88, 90, 93, 94, 96, 99, 101, 102, 104, 106, 108, 111, 113, 115, 116, 118, 120, 123, 125

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OFFSET

0,2

COMMENTS

a(n) = 2*n + A212412(n): concatenation of binary representation of n and the parity of its curling number;

A212444 gives iterations starting from 0.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..8191

Benjamin Chaffin and N. J. A. Sloane, The Curling Number Conjecture, preprint.

Index entries for sequences related to binary expansion of n

PROG

(Haskell)