0,2

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.

T. D. Noe, Table of n, a(n) for n=0..35

Sequence in context: A012767 A136525 A136556 this_sequence A012499 A125530 A068726

Adjacent sequences: A006095 A006096 A006097 this_sequence A006099 A006100 A006101

nonn

njas