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=-1.

A176678

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=-1.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =9a(4) =29a(5) =102a(6) =373a(7) =1408a(8) =5441a(9) =21428a(10) =85697a(11) =347133a(12) =1421315a(13) =5872986a(14) =24459731a(15) =102570877a(16) =432725309a(17) =1835333352a(18) =7821313273a(19) =33472882591a(20) =143804772471a(21) =619960227498

External references