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A026492 a(n) = t(3n), where t = A001285 (Thue-Morse sequence). 4
1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 2, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,8

LINKS

Michael De Vlieger, Table of n, a(n) for n = 0..10000

Michael Gilleland, Some Self-Similar Integer Sequences

MATHEMATICA

Array[1 + Mod[DigitCount[3 #, 2, 1], 2] &, 105, 0] (* Michael De Vlieger, Oct 03 2019 *)

PROG

(PARI) a(n)=1+hammingweight(3*n)%2 \\ Charles R Greathouse IV, May 09 2016

CROSSREFS

Cf. A001285, A026498, A026513.

Sequence in context: A158854 A119849 A246588 * A182284 A139551 A022931

Adjacent sequences:  A026489 A026490 A026491 * A026493 A026494 A026495

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

Name and Pari adapted to match offset in A001285 by Sean A. Irvine, Oct 02 2019

STATUS

approved

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Last modified April 16 05:26 EDT 2021. Contains 343030 sequences. (Running on oeis4.)