7,2

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, 7, -8) for n in xrange(7, 14)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 27 2009]

Sequence in context: A145537 A147525 A115495 this_sequence A145276 A064820 A032595

Adjacent sequences: A015344 A015345 A015346 this_sequence A015348 A015349 A015350

sign,easy

Olivier Gerard (olivier.gerard(AT)gmail.com)