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=-1 and l=0.

A176857

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=-1 and l=0.

Terms

    a(0) =1a(1) =3a(2) =4a(3) =14a(4) =48a(5) =191a(6) =776a(7) =3271a(8) =14062a(9) =61601a(10) =273796a(11) =1232248a(12) =5604252a(13) =25718825a(14) =118949392a(15) =553888342a(16) =2594626912a(17) =12218698001a(18) =57812767484a(19) =274701432034

External references