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A006115 Gaussian binomial coefficient [ n,n/2 ] for q=5.
(Formerly M4211)
0
1, 1, 6, 31, 806, 20306, 2558556, 320327931, 200525284806, 125368356709806, 391901483074853556, 1224770494838892134806, 19138263752352528498478556 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

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.

CROSSREFS

Sequence in context: A144576 A120107 A015462 * A144780 A126976 A045159

Adjacent sequences:  A006112 A006113 A006114 * A006116 A006117 A006118

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.