0,2

Binomial transform of A099213.

G.f.: (1-2x)/((1-2x)^2-4x^3); a(n)=sum{k=0..floor(n/3), binomial(n-k, 2k)4^k*2^(n-3k)}.

Cf. A073724.

Sequence in context: A108532 A000940 A008404 this_sequence A126946 A113179 A056236

Adjacent sequences: A099211 A099212 A099213 this_sequence A099215 A099216 A099217

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Oct 06 2004