OFFSET
1,3
FORMULA
Number of compositions of n such that the greatest part occurs with odd multiplicity.
EXAMPLE
a(4)=6 because we have (4),(3,1),(1,3),(2,1,1),(1,2,1) and (1,1,2).
MAPLE
G:=sum((1-x)^(2*l)*sum(x^((2*l-1)*k)/(1-2*x+x^k)^(2*l), k=1..30), l=1..20): Gser:=series(G, x=0, 35): seq(coeff(Gser, x^n), n=1..33); # Emeric Deutsch, Jun 07 2005
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Vladeta Jovovic, Apr 12 2005
EXTENSIONS
More terms from Emeric Deutsch, Jun 07 2005
STATUS
approved