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)=4, k=1 and l=-1.

A176830

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)=4, k=1 and l=-1.

Terms

    a(0) =1a(1) =4a(2) =9a(3) =36a(4) =147a(5) =667a(6) =3163a(7) =15610a(8) =79121a(9) =409697a(10) =2157185a(11) =11514865a(12) =62167261a(13) =338870851a(14) =1862411885a(15) =10308811304a(16) =57417591755a(17) =321563019095

External references