0,3

A row of A099233.

G.f.: 1/(1-x(1+x)^4); a(n)=sum{k=0..n, binomial(4(n-k), k)}; a(n)=a(n-1)+4a(n-2)+6a(n-3)+4a(n-4)+a(n-5); a(n)=A003520(4n).

Sequence in context: A000335 A005030 A084244 this_sequence A035069 A001869 A058425

Adjacent sequences: A099232 A099233 A099234 this_sequence A099236 A099237 A099238

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Oct 08 2004