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P. Sole', Counting lattice points in pyramids, Discr. Math. 139 (1995), 381-392.
Table of n, a(n) for n=0..21.
series(((1+x)^8+224*x^2*(1+x)^4+256*x^4)/(1-x)^8, x, 40);
Sequence in context: A227102 A221577 A136269 * A053103 A223032 A171680
Adjacent sequences: A010365 A010366 A010367 * A010369 A010370 A010371
N. J. A. Sloane, Simon Plouffe