a(n) = n! * Sum_{k=0..n} (-1)^(n-k) * binomial(k+4,5) / k!.
A368587
a(n) = n! * Sum_{k=0..n} (-1)^(n-k) * binomial(k+4,5) / k!.
Terms
- a(0) =0a(1) =1a(2) =4a(3) =9a(4) =20a(5) =26a(6) =96a(7) =-210a(8) =2472a(9) =-20961a(10) =211612a(11) =-2324729a(12) =27901116a(13) =-362708320a(14) =5077925048a(15) =-76168864092
External references
- oeis: A368587