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Search: id:A010368
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| A010368 |
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Number of points of L1 norm 2n in Hamming code version of E_8 lattice. |
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+0
2
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| 1, 16, 352, 3376, 19648, 82256, 273440, 767600, 1894784, 4228752, 8703712, 16763824, 30549568, 53125072, 88750496, 143203568, 224154368, 341597456, 508345440, 740588080, 1058521024, 1487048272
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OFFSET
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0,2
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REFERENCES
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P. Sole', Counting lattice points in pyramids, Discr. Math. 139 (1995), 381-392.
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MAPLE
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series(((1+x)^8+224*x^2*(1+x)^4+256*x^4)/(1-x)^8, x, 40);
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CROSSREFS
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Cf. A010369.
Sequence in context: A013993 A058722 A136269 this_sequence A053103 A155122 A094101
Adjacent sequences: A010365 A010366 A010367 this_sequence A010369 A010370 A010371
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Simon Plouffe (simon.plouffe(AT)gmail.com)
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