A026517 a(n) = t(5n), where t = A001285 (Thue-Morse sequence).

1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 2, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 1, 1, 1, 2, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 2, 2, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 2, 2, 1, 2, 1, 2, 2, 2, 2, 2, 1, 2, 1, 1, 2, 2

Offset

0,6

Links

Paolo Xausa, Table of n, a(n) for n = 0..10000

Michael Gilleland, Some Self-Similar Integer Sequences.

Mathematica

ThueMorse[Range[0, 500, 5]] + 1 (* Paolo Xausa, Nov 28 2024 *)

Prog

(PARI) a(n)=1+hammingweight(5*n)%2 \\ Charles R Greathouse IV, May 09 2016

Crossrefs

Cf. A001285.

Sequence in context: A373989 A329618 A374033 * A072047 A327521 A282870

Adjacent sequences: A026514 A026515 A026516 * A026518 A026519 A026520

Keyword

nonn

Author

Clark Kimberling

Extensions

Name and Pari code corrected by Sean A. Irvine, Oct 05 2019

Status

approved