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 A015293 Gaussian binomial coefficient [ n,4 ] for q = -7. 2
 1, 2101, 5149551, 12328144851, 29612203932102, 71094673339606302, 170699761008128301202, 409849628721453245181802, 984049129188697468764456303, 2362701900656492615160524472603, 5672847283550509352791825564114953, 13620506320919298149305087013514770853 (list; graph; refs; listen; history; text; 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. LINKS Vincenzo Librandi, Table of n, a(n) for n = 4..300 Index entries for linear recurrences with constant coefficients, signature (2101, 735350, -36032150, -247180549, 282475249). MATHEMATICA QBinomial[Range[4, 17], 4, -7] (* Harvey P. Dale, Sep 24 2011 *) Table[QBinomial[n, 4, -7], {n, 4, 20}] (* Vincenzo Librandi, Oct 28 2012 *) PROG (Sage) [gaussian_binomial(n, 4, -7) for n in xrange(4, 14)] # Zerinvary Lajos, May 27 2009 (MAGMA) r:=4; q:=-7; [&*[(1-q^(n-i+1))/(1-q^i): i in [1..r]]: n in [r..20]]; // Vincenzo Librandi, Aug 02 2016 CROSSREFS Sequence in context: A045051 A102504 A270761 * A159812 A233729 A272770 Adjacent sequences:  A015290 A015291 A015292 * A015294 A015295 A015296 KEYWORD nonn,easy AUTHOR Olivier Gérard, Dec 11 1999 EXTENSIONS More terms from Harvey P. Dale, Sep 24 2011 STATUS approved

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Last modified March 25 01:17 EDT 2019. Contains 321450 sequences. (Running on oeis4.)