G.f.: Sum_{n>=0} (n+1)*(n+2)*(n+3)/3! * x^n * (1+x)^(n*(n+3)).
A325587
G.f.: Sum_{n>=0} (n+1)*(n+2)*(n+3)/3! * x^n * (1+x)^(n*(n+3)).
Terms
- a(0) =1a(1) =4a(2) =26a(3) =144a(4) =861a(5) =5300a(6) =33974a(7) =226716a(8) =1572134a(9) =11318196a(10) =84460828a(11) =652359324a(12) =5207769776a(13) =42909334344a(14) =364439847976
External references
- oeis: A325587