-20271

Appears in sequences

• Expansion of (1-x)^(-1)/(1+x-x^2-2*x^3).at n=42A077901
• Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=0, k=-1 and l=-1.at n=12A176952
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A384974.at n=63A384977