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A022256
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Gaussian binomial coefficients [ n,5 ] for q = 9.
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1
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1, 66430, 3971657053, 234844517989720, 13869447829832637406, 818990894351617238824300, 48360684318187059842589436510, 2855650645340126913932218722028600, 168623318873839155489174680568370759015
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OFFSET
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5,2
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REFERENCES
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F. J. MacWilliams and N. J. A. Sloane, The Theory of Error-Correcting Codes, Elsevier-North Holland, 1978, p. 698.
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LINKS
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FORMULA
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a(n) = Product_{i=1..5} (9^(n-i+1)-1)/(9^i-1), by definition. - Vincenzo Librandi, Aug 04 2016
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MATHEMATICA
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PROG
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(Sage) [gaussian_binomial(n, 5, 9) for n in range(5, 16)] # Zerinvary Lajos, May 27 2009
(Magma) r:=5; q:=9; [&*[(1-q^(n-i+1))/(1-q^i): i in [1..r]]: n in [r..20]]; // Vincenzo Librandi, Aug 04 2016
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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