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=-1 and l=1.

A176966

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=-1 and l=1.

Terms

    a(0) =1a(1) =4a(2) =7a(3) =28a(4) =109a(5) =487a(6) =2233a(7) =10666a(8) =52111a(9) =259957a(10) =1317331a(11) =6765121a(12) =35126623a(13) =184109599a(14) =972775495a(15) =5175914824a(16) =27709135453a(17) =149145574915a(18) =806659265809

External references