4,2

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

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.

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

(Other) sage: [gaussian_binomial(n, 4, 4) for n in xrange(4, 14)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 27 2009]

Sequence in context: A086250 A069309 A086806 this_sequence A015371 A163582 A045106

Adjacent sequences: A006104 A006105 A006106 this_sequence A006108 A006109 A006110

nonn

N. J. A. Sloane (njas(AT)research.att.com).