A022925 Number of 5^m between 2^n and 2^(n+1).

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

Offset

0,1

Comments

All terms <= 1; each 1 is followed by either one or two 0's. - Robert Israel, Mar 29 2020

Links

Robert Israel, Table of n, a(n) for n = 0..10000

Formula

a(n) = floor((n+1)*log_5(2))-floor(n*log_5(2)) - Stephen P. Glasby (GlasbyS(AT)cwu.edu), Jul 29 2003

Maple

F:= [seq(floor(n*log[5](2)), n=0..101)]:
F[2..-1]-F[1..-2]; # Robert Israel, Mar 29 2020

Prog

(PARI) logint(2^(n+1), 5)-logint(2^n, 5) \\ Charles R Greathouse IV, Jan 16 2017

Crossrefs

Sequence in context: A324908 A353760 A358770 * A327211 A379969 A348327

Adjacent sequences: A022922 A022923 A022924 * A022926 A022927 A022928

Keyword

nonn

Author

Clark Kimberling

Status

approved