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

A176611

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

Terms

    a(0) =1a(1) =1a(2) =5a(3) =15a(4) =45a(5) =151a(6) =549a(7) =2083a(8) =8133a(9) =32487a(10) =132141a(11) =545299a(12) =2277021a(13) =9603111a(14) =40844629a(15) =174997363a(16) =754562037a(17) =3271847975a(18) =14257744125a(19) =62407576979a(20) =274256671949

External references