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)=3, k=0 and l=-2.

A176755

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)=3, k=0 and l=-2.

Terms

    a(0) =1a(1) =3a(2) =4a(3) =15a(4) =52a(5) =208a(6) =846a(7) =3579a(8) =15456a(9) =68096a(10) =304570a(11) =1379980a(12) =6319978a(13) =29211278a(14) =136086710a(15) =638364319a(16) =3012609980a(17) =14293438828a(18) =68139158918a(19) =326218902372

External references