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

(list; graph; refs; listen; history; text; internal format)

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)

a212439 n = 2 * n + a212412 n

CROSSREFS

Cf. A014601, A007088, A181935, A212412, A212444.

Sequence in context: A047444 A279933 A327206 * A160734 A121501 A327218

Adjacent sequences: A212436 A212437 A212438 * A212440 A212441 A212442

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 17 2012

STATUS

approved

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