login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A022257 Gaussian binomial coefficients [ n,6 ] for q = 9. 1
1, 597871, 321704819164, 171201975319325044, 90997618413507253345810, 48360684318187059842589436510, 25700898795425967456865415317747420, 13658514212390616911370927114097728660820, 7258694620170400715835032365617891585605600635 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,2

REFERENCES

F. J. MacWilliams and N. J. A. Sloane, The Theory of Error-Correcting Codes, Elsevier-North Holland, 1978, p. 698.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 6..180

FORMULA

a(n) = Product_{i=1..6} (9^(n-i+1)-1)/(9^i-1), by definition. - Vincenzo Librandi, Aug 04 2016

MATHEMATICA

Table[QBinomial[n, 6, 9], {n, 6, 20}] (* Vincenzo Librandi, Aug 04 2016 *)

PROG

(Sage) [gaussian_binomial(n, 6, 9) for n in xrange(6, 15)] # Zerinvary Lajos, May 27 2009

(MAGMA) r:=6; q:=9; [&*[(1-q^(n-i+1))/(1-q^i): i in [1..r]]: n in [r..20]]; // Vincenzo Librandi, Aug 04 2016

CROSSREFS

Sequence in context: A151435 A143910 A206598 * A237536 A209515 A106779

Adjacent sequences:  A022254 A022255 A022256 * A022258 A022259 A022260

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Offset changed by Vincenzo Librandi, Aug 04 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 22 10:17 EDT 2019. Contains 322330 sequences. (Running on oeis4.)