a(n) = floor((n+3)^(n+2)/((n+3)^2-1)).

A089816

a(n) = floor((n+3)^(n+2)/((n+3)^2-1)).

Terms

    a(0) =1a(1) =4a(2) =26a(3) =222a(4) =2451a(5) =33288a(6) =538084a(7) =10101010a(8) =216145205a(9) =5195862732a(10) =138679078110

External references