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A015341 Gaussian binomial coefficient [ n,7 ] for q = -4. 3
1, -13107, 229062301, -3695215419555, 60779845138496605, -994845394688060798883, 16303527542855381993658461, -267100691734599723202106566563, 4376244513647234644625387176712285 (list; graph; refs; listen; history; text; internal format)
OFFSET

7,2

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 = 7..200

Index entries for linear recurrences with constant coefficients, signature (-13107,57268852,57727002816,-14850554449920,-945799214137344,15372990401216512,57645195621040128,-72057594037927936).

FORMULA

G.f.: x^7 / ( (x-1)*(16384*x+1)*(4096*x-1)*(256*x-1)*(64*x+1)*(4*x+1)*(16*x-1)*(1024*x+1) ). - R. J. Mathar, Sep 02 2016

MATHEMATICA

Table[QBinomial[n, 7, -4], {n, 7, 20}] (* Vincenzo Librandi, Oct 29 2012 *)

PROG

(Sage) [gaussian_binomial(n, 7, -4) for n in range(7, 16)] # Zerinvary Lajos, May 27 2009

CROSSREFS

Sequence in context: A235335 A184768 A252548 * A233689 A250904 A250948

Adjacent sequences:  A015338 A015339 A015340 * A015342 A015343 A015344

KEYWORD

sign,easy

AUTHOR

Olivier Gérard, Dec 11 1999

STATUS

approved

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Last modified July 11 04:33 EDT 2020. Contains 335609 sequences. (Running on oeis4.)