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A015350 Gaussian binomial coefficient [ n,7 ] for q = -10. 2
1, -9090909, 91827363728191, -917356280909173462809, 9174480257209191175298447191, -91743885133148835462057759420652809, 917439768771348869854580597622587770347191 (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
MATHEMATICA
Table[QBinomial[n, 7, -10], {n, 7, 20}] (* Harvey P. Dale, Mar 22 2012 *)
PROG
(Sage) [gaussian_binomial(n, 7, -10) for n in range(7, 14)] # Zerinvary Lajos, May 27 2009
(Magma) r:=7; q:=-10; [&*[(1-q^(n-i+1))/(1-q^i): i in [1..r]]: n in [r..15]]; // Vincenzo Librandi, Nov 06 2016
CROSSREFS
Sequence in context: A105012 A186139 A335581 * A233613 A172620 A172711
KEYWORD
sign,easy
AUTHOR
Olivier Gérard, Dec 11 1999
STATUS
approved

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)