OFFSET
1,2
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..1000
FORMULA
G.f.: 1/Product_{j>=1} (1 - x*binomial(j, floor(j/2))). - Emeric Deutsch, Jun 21 2009
EXAMPLE
a(6)=8 because we have 6, 33, 321, 3111, 222, 2211, 21111, and 111111. - Emeric Deutsch, Jun 21 2009
MAPLE
g := 1/(product(1-x^binomial(j, floor((1/2)*j)), j = 1 .. 15)): gser := series(g, x = 0, 63): seq(coeff(gser, x, n), n = 1 .. 55); # Emeric Deutsch, Jun 21 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 06 2009
STATUS
approved