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)=2, k=0 and l=-2.

A176754

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)=2, k=0 and l=-2.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =6a(4) =18a(5) =62a(6) =218a(7) =790a(8) =2914a(9) =10926a(10) =41514a(11) =159558a(12) =619314a(13) =2424414a(14) =9561594a(15) =37956726a(16) =151548930a(17) =608199182a(18) =2452070090a(19) =9926901670a(20) =40338175954a(21) =164471889342a(22) =672683135130

External references