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A015291 Gaussian binomial coefficient [ n,4 ] for q=-5. 0
1, 521, 339171, 210302171, 131649159046, 82254445109046, 51412313316921546, 32132285187903171546, 20082729571968536374671, 12551699566292514833249671, 7844813030956382105126218421 (list; graph; refs; listen; history; internal format)
OFFSET

4,2

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.

M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351.

PROG

(Other) sage: [gaussian_binomial(n, 4, -5) for n in xrange(4, 15)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 27 2009]

CROSSREFS

Sequence in context: A167734 A122715 A153180 * A028484 A057699 A033525

Adjacent sequences:  A015288 A015289 A015290 * A015292 A015293 A015294

KEYWORD

nonn,easy

AUTHOR

Olivier Gerard (olivier.gerard(AT)gmail.com)

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Last modified February 16 10:53 EST 2012. Contains 205904 sequences.