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OFFSET
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0,1
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COMMENTS
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A 9-cube or enneract is a nine-dimensional hypercube with 512 vertices, 2304 edges, 4608 square faces, 5376 cubic cells, 4032 tesseract 4-faces, 2016 penteract 5-faces, 672 hexeract 6-faces, 144 hepteract 7-faces and 18 octeract 8-faces.
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LINKS
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Table of n, a(n) for n=0..9.
Wikipedia, Enneract.
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MAPLE
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for i from 9 to 9 do seq(binomial(i, j)*2^(i-j), j = 0 .. i-1) od;
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PROG
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(PARI) Vec((x+2)^9+O(x^10)) \\ Joerg Arndt, Apr 15 2013
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CROSSREFS
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Cf. A038207, A135269, A135270, A135271, A135272.
Sequence in context: A251192 A251187 A223333 * A258522 A258519 A254568
Adjacent sequences: A135270 A135271 A135272 * A135274 A135275 A135276
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KEYWORD
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easy,fini,nonn,full
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AUTHOR
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Zerinvary Lajos, Dec 02 2007
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STATUS
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approved
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