A022924 Number of 3^m between 2^n and 2^(n+1).

0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1

Offset: 0

Author

Clark Kimberling

Keywords

• nonn

Comments

This is a Sturmian sequence; consider the straight line of equation y = x*log(3)/log(2), the sequence gives the number m of integer ordinate points between the abscissa points n and n+1. - Richard Aime Blavy, Jun 14 2020

Links

• David A. Corneth, Table of n, a(n) for n = 0..9999

Crossrefs

Cf. A136409 (partial sums).

First differences of A020915.

Programs

PARI

a(n) = logint(2^(n+1),3)-logint(2^n,3) \\ Charles R Greathouse IV, Jan 16 2017