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.

A176957

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) =5a(3) =22a(4) =79a(5) =353a(6) =1551a(7) =7192a(8) =33789a(9) =162387a(10) =791013a(11) =3905115a(12) =19480249a(13) =98078377a(14) =497676217a(15) =2542770602a(16) =13070074447a(17) =67540608437a(18) =350682097767

External references