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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A006109 Gaussian binomial coefficient [ n,n/2 ] for q=4.
(Formerly M3917)
1
1, 1, 5, 21, 357, 5797, 376805, 24208613, 6221613541, 1594283908581, 1634141006295525, 1673768626404966885, 6857430062381149327845, 28089747579101385828291045, 460250514083576206796548772325, 7540859480106603961931048583270885 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

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.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..80

M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351. (Annotated scanned copy)

MATHEMATICA

Table[QBinomial[n, Floor[n/2], 4], {n, 0, 20}] (* Vincenzo Librandi, Aug 13 2016 *)

CROSSREFS

Sequence in context: A301797 A015461 A101694 * A009732 A009758 A143503

Adjacent sequences:  A006106 A006107 A006108 * A006110 A006111 A006112

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

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 March 24 19:33 EDT 2019. Contains 321448 sequences. (Running on oeis4.)