A205987 G.f.: Sum_{n=-oo..oo} q^(9n^2+8n).

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

Offset

0

Links

Jason Kimberley, Table of n, a(n) for n = 0..1000

S. Cooper and M. D. Hirschhorn, Results of Hurwitz type for three squares. Discrete Math. 274 (2004), no. 1-3, 9-24. See C(q).

Crossrefs

Characteristic function of A218864.

Sequence in context: A014028 A014047 A016411 * A014026 A014043 A016422

Adjacent sequences: A205984 A205985 A205986 * A205988 A205989 A205990

Keyword

nonn,easy

Author

N. J. A. Sloane, Feb 02 2012

Extensions

Minor editing by Jason Kimberley, Nov 07 2012

Status

approved