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.

A176759

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.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =4a(4) =11a(5) =27a(6) =67a(7) =178a(8) =505a(9) =1489a(10) =4473a(11) =13593a(12) =41749a(13) =129579a(14) =406021a(15) =1282464a(16) =4077987a(17) =13041655a(18) =41919347a(19) =135352451a(20) =438827223a(21) =1427986281a(22) =4662359911a(23) =15268900019a(24) =50143755435a(25) =165095296125a(26) =544847069819

External references