A171896 Number of 0's in first n terms of Van Eck's sequence (A181391).

1, 2, 2, 3, 3, 4, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20

Offset

1,2

Comments

Initially, seems to be about 0.136 times n. Maybe constant times n/log(n)? It would be nice to know more. - N. J. A. Sloane, Oct 10 2017

a(10^12) = 90689534032. - Benjamin Chaffin, Sep 11 2019

Links

N. J. A. Sloane, Table of n, a(n) for n = 1..10000

Benjamin Chaffin, Plot of a(n)/n for the first 10^12 terms

Crossrefs

Essentially A171895 + 1. First differences give A171894. Cf. A181391.

Sequence in context: A098388 A371672 A157792 * A341167 A094235 A328003

Adjacent sequences: A171893 A171894 A171895 * A171897 A171898 A171899

Keyword

nonn

Author

N. J. A. Sloane, Oct 19 2010

Status

approved