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A022217 Gaussian binomial coefficients [ n,10 ] for q = 5. 1
1, 12207031, 124176340230306, 1222439084242108174806, 11957012900737114492991256681, 116805081731088587940522831693775431, 1140747634121270227670449517400445860666056, 11140256209730412546658078532854767895273286916056 (list; graph; refs; listen; history; text; internal format)
OFFSET
10,2
REFERENCES
F. J. MacWilliams and N. J. A. Sloane, The Theory of Error-Correcting Codes, Elsevier-North Holland, 1978, p. 698.
LINKS
FORMULA
G.f.: x^10/((1-x)*(1-5*x)*(1-25*x)*(1-125*x)*(1-625*x)*(1-3125*x)*(1-15625*x)*(1-78125*x)*(1-390625*x)*(1-1953125*x)*(1-9765625*x)). - Vincenzo Librandi, Aug 10 2016
a(n) = Product_{i=1..10} (5^(n-i+1)-1)/(5^i-1), by definition. - Vincenzo Librandi, Aug 06 2016
MATHEMATICA
Table[QBinomial[n, 10, 5], {n, 10, 20}] (* Vincenzo Librandi, Aug 10 2016 *)
PROG
(Sage) [gaussian_binomial(n, 10, 5) for n in range(10, 17)] # Zerinvary Lajos, May 27 2009
(Magma) r:=10; q:=5; [&*[(1-q^(n-i+1))/(1-q^i): i in [1..r]]: n in [r..20]]; // Vincenzo Librandi, Aug 10 2016
(PARI) r=10; q=5; for(n=r, 30, print1(prod(j=1, r, (1-q^(n-j+1))/(1-q^j)), ", ")) \\ G. C. Greubel, Jun 07 2018
CROSSREFS
Sequence in context: A204888 A268418 A286301 * A133373 A321987 A288272
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Offset changed by Vincenzo Librandi, Aug 10 2016
STATUS
approved

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Last modified March 29 09:44 EDT 2024. Contains 371268 sequences. (Running on oeis4.)