a(0) = 1; a(n) = -(n!)^4 * Sum_{k=0..n-1} a(k) / (k! * (n-k))^4.
A337677
a(0) = 1; a(n) = -(n!)^4 * Sum_{k=0..n-1} a(k) / (k! * (n-k))^4.
Terms
- a(0) =1a(1) =-1a(2) =15a(3) =-1150a(4) =277760a(5) =-164021776a(6) =200693093392
External references
- oeis: A337677