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A045852 Number of nonnegative solutions of x1^2 + x2^2 +...+ x10^2 = n. 1
1, 10, 45, 120, 220, 342, 570, 960, 1350, 1640, 2191, 3240, 4200, 4720, 5760, 7920, 9865, 10620, 11965, 15600, 19332, 20550, 22200, 28080, 34200, 35582, 37395, 45720, 54600, 56970, 59460, 71040, 84330 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

REFERENCES

Coefficient of q^n in (1+q+q^4+q^9+q^16+q^25+q^36+q^49+q^64+...)^10.

LINKS

T. D. Noe, Table of n, a(n) for n=0..2000

MATHEMATICA

Take[CoefficientList[Expand[(Total[x^Range[0, 5]^2])^10], x], 50] (* From Harvey P. Dale, May 20 2011 *)

CROSSREFS

Sequence in context: A001488 A009540 A010926 * A105938 A022605 A179095

Adjacent sequences:  A045849 A045850 A045851 * A045853 A045854 A045855

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 15 12:25 EST 2012. Contains 205786 sequences.