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)=4, k=0 and l=-1.

A176750

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)=4, k=0 and l=-1.

Terms

    a(0) =1a(1) =4a(2) =7a(3) =29a(4) =113a(5) =506a(6) =2321a(7) =11112a(8) =54429a(9) =272364a(10) =1384701a(11) =7135397a(12) =37178543a(13) =195556526a(14) =1036967927a(15) =5537451445a(16) =29752654081a(17) =160731437308a(18) =872518135861

External references