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Search: id:A015289
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| A015289 |
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Gaussian binomial coefficient [ n,4 ] for q=-4. |
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+0
1
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| 1, 205, 55965, 14107485, 3625623645, 927257668701, 237435704507485, 60779845138496605, 15559876852907031645, 3983313338565919030365, 1019729183363623510391901, 261050608944894743386831965
(list; graph; listen)
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OFFSET
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4,2
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REFERENCES
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J. Goldman and G.-C. Rota, The number of subspaces of a vector space, pp. 75-83 of W. T. Tutte, editor, Recent Progress in Combinatorics. Academic Press, NY, 1969.
I. P. Goulden and D. M. Jackson, Combinatorial Enumeration. Wiley, NY, 1983, p, 99.
M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351.
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PROGRAM
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(Other) sage: [gaussian_binomial(n, 4, -4) for n in xrange(4, 16)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 27 2009]
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CROSSREFS
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Sequence in context: A015974 A077457 A060892 this_sequence A080529 A058180 A025351
Adjacent sequences: A015286 A015287 A015288 this_sequence A015290 A015291 A015292
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KEYWORD
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nonn,easy
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AUTHOR
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Olivier Gerard (olivier.gerard(AT)gmail.com)
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