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=0.

A176858

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=0.

Terms

    a(0) =1a(1) =4a(2) =6a(3) =25a(4) =94a(5) =419a(6) =1884a(7) =8866a(8) =42524a(9) =208361a(10) =1036268a(11) =5222754a(12) =26607772a(13) =136824505a(14) =709211688a(15) =3701711655a(16) =19438809610a(17) =102629612589a(18) =544446273752

External references