a(n+1) = Sum_{p=0..n} (a(p)*a(n-p)+k)+l for n>=1, where a(0)=1, a(1)=1, k=1 and l=-1.

A176826

a(n+1) = Sum_{p=0..n} (a(p)*a(n-p)+k)+l for n>=1, where a(0)=1, a(1)=1, k=1 and l=-1.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =9a(4) =27a(5) =85a(6) =283a(7) =985a(8) =3539a(9) =13013a(10) =48707a(11) =184921a(12) =710347a(13) =2755669a(14) =10780139a(15) =42477977a(16) =168439619a(17) =671641685a(18) =2691362195a(19) =10832277401a(20) =43771088315a(21) =177504638933a(22) =722178443963

External references