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A015327 Gaussian binomial coefficient [ n,6 ] for q = -5. 2
1, 13021, 211929796, 3285123767796, 51412313316921546, 803060432690378496546, 12548622321219854387027796, 196069714237340352552410777796, 3063597127265150338968694860387171 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,2

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.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 6..200

Index entries for linear recurrences with constant coefficients, signature (13021, 42383355, -26287771375, -3285971421875, 82779990234375, 397369384765625, -476837158203125).

FORMULA

G.f.: x^6 /((x-1)*(5*x+1)*(25*x-1)*(625*x-1)*(125*x+1)*(15625*x-1)*(3125*x+1)). - R. J. Mathar, Sep 02 2016

MATHEMATICA

Table[QBinomial[n, 6, -5], {n, 6, 20}] (* Vincenzo Librandi, Oct 29 2012 *)

PROG

(Sage) [gaussian_binomial(n, 6, -5) for n in xrange(6, 15)] # Zerinvary Lajos, May 27 2009

CROSSREFS

Sequence in context: A203910 A138762 A139777 * A210016 A079230 A262659

Adjacent sequences:  A015324 A015325 A015326 * A015328 A015329 A015330

KEYWORD

nonn,easy

AUTHOR

Olivier Gérard, Dec 11 1999

STATUS

approved

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Last modified March 24 19:48 EDT 2019. Contains 321448 sequences. (Running on oeis4.)