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 A015349 Gaussian binomial coefficient [ n,7 ] for q = -9. 2
 1, -4304672, 20846476694116, -99571465386311288480, 476319830905927777714449130, -2278184404047301621409794099651808, 10896505884544222754038383150470776581556, -52117638957586712017437457380440909324731738208 (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..150 MATHEMATICA QBinomial[Range[7, 20], 7, -9] (* Harvey P. Dale, Dec 28 2011 *) PROG (Sage) [gaussian_binomial(n, 7, -9) for n in xrange(7, 14)] # Zerinvary Lajos, May 27 2009 (MAGMA) r:=7; q:=-9; [&*[(1-q^(n-i+1))/(1-q^i): i in [1..r]]: n in [r..15]]; // Vincenzo Librandi, Nov 02 2012 CROSSREFS Sequence in context: A210308 A205271 A234168 * A210403 A263155 A254266 Adjacent sequences:  A015346 A015347 A015348 * A015350 A015351 A015352 KEYWORD sign,easy AUTHOR Olivier Gérard, Dec 11 1999 EXTENSIONS One more term from Harvey P. Dale, Dec 28 2011 STATUS approved

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Last modified March 26 10:18 EDT 2019. Contains 321491 sequences. (Running on oeis4.)