A006104 Gaussian binomial coefficient [ n,n/2 ] for q=3.

1, 1, 4, 13, 130, 1210, 33880, 925771, 75913222, 6174066262, 1506472167928, 366573514642546, 267598665689058580, 195168545232713290660, 427028776969176679964080, 934054234760012359481199283, 6129263888495201102915629695046

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn

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

• T. D. Noe, Table of n, a(n) for n=0..50
• M. Sved, Gaussians and binomials, Ars. Combinatoria, 17A (1984), 325-351. (Annotated scanned copy)

Programs

Mathematica

Table[QBinomial[n,Floor[n/2],3],{n,0,20}] (* Harvey P. Dale, Nov 11 2011 *)

Extensions

More terms from Harvey P. Dale, Nov 11 2011