OFFSET
0,1
COMMENTS
See a comment on A201204 for the definition of the half-convolution of a sequence with itself, and the rule for the o.g.f.s of the bisection. Here the o.g.f. is (Lconve(x) + L2(x))/2, with the o.g.f. Lconve(x) = (4-11*x+11*x^2+x^3)/
FORMULA
CROSSREFS
KEYWORD
nonn
AUTHOR
Wolfdieter Lang, Jan 03 2012
STATUS
approved