a(n) = Sum_{k=0..n} (-1)^(n-k) * (n+4*k)!/((n-k)! * k!^5).
A336171
a(n) = Sum_{k=0..n} (-1)^(n-k) * (n+4*k)!/((n-k)! * k!^5).
Terms
- a(0) =1a(1) =119a(2) =112681a(3) =166923119a(4) =302857024681
External references
- oeis: A336171
A336171
a(n) = Sum_{k=0..n} (-1)^(n-k) * (n+4*k)!/((n-k)! * k!^5).