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A006104
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Gaussian binomial coefficient [ n,n/2 ] for q=3.
(Formerly M3472)
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1
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1, 1, 4, 13, 130, 1210, 33880, 925771, 75913222, 6174066262, 1506472167928, 366573514642546, 267598665689058580, 195168545232713290660, 427028776969176679964080, 934054234760012359481199283, 6129263888495201102915629695046
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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REFERENCES
| 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.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351.
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LINKS
| T. D. Noe, Table of n, a(n) for n=0..50
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MATHEMATICA
| Table[QBinomial[n, Floor[n/2], 3], {n, 0, 20}] (* From Harvey P. Dale, Nov 11 2011 *)
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CROSSREFS
| Sequence in context: A121813 A197897 A203380 * A067634 A203215 A198159
Adjacent sequences: A006101 A006102 A006103 * A006105 A006106 A006107
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Harvey P. Dale, Nov 11 2011
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