A110916 Number of squares between 10n and 10n+9 (inclusive).

4, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0

Offset

0,1

Links

G. C. Greubel, Table of n, a(n) for n = 0..5000

Example

a(0) = 4 since between 0 and 9 there are 4 squares {0,1,4,9}.

Mathematica

f2[n_] := If[n < 0, 0, Floor[n^(1/2)] + 1]; Table[f2[10n + 9] - f2[10n - 1], {n, 0, 120}] (* Ray Chandler, Oct 07 2005 *)

Crossrefs

Cf. A111025, A111037.

Sequence in context: A276974 A122777 A103524 * A185058 A368474 A369935

Adjacent sequences: A110913 A110914 A110915 * A110917 A110918 A110919

Keyword

nonn

Author

Giovanni Teofilatto, Oct 04 2005

Extensions

Extended by Ray Chandler, Oct 07 2005

Status

approved