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)=3, k=-1 and l=-1.

A176956

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)=3, k=-1 and l=-1.

Terms

    a(0) =1a(1) =3a(2) =3a(3) =11a(4) =35a(5) =139a(6) =547a(7) =2251a(8) =9379a(9) =39819a(10) =171171a(11) =744651a(12) =3271203a(13) =14494859a(14) =64707875a(15) =290773707a(16) =1314227619a(17) =5970720651a(18) =27251241891a(19) =124895810251a(20) =574563563299

External references