A010368 Number of points of L1 norm 2n in Hamming code version of E_8 lattice.

1, 16, 352, 3376, 19648, 82256, 273440, 767600, 1894784, 4228752, 8703712, 16763824, 30549568, 53125072, 88750496, 143203568, 224154368, 341597456, 508345440, 740588080, 1058521024, 1487048272

Offset

0,2

Links

Ray Chandler, Table of n, a(n) for n = 0..1000

P. Solé, Counting lattice points in pyramids, Discr. Math. 139 (1995), 381-392.

Index entries for linear recurrences with constant coefficients, signature (8, -28, 56, -70, 56, -28, 8, -1).

Maple

series(((1+x)^8+224*x^2*(1+x)^4+256*x^4)/(1-x)^8, x, 40);

Crossrefs

Cf. A010369.

Sequence in context: A221577 A363383 A136269 * A053103 A223032 A171680

Adjacent sequences: A010365 A010366 A010367 * A010369 A010370 A010371

Keyword

nonn

Author

N. J. A. Sloane, Simon Plouffe

Status

approved