de Bruijn's S(5,n) = Sum_{k = 0..2*n} (-1)^(n+k)*binomial(2*n, k)^5.
A050984
de Bruijn's S(5,n) = Sum_{k = 0..2*n} (-1)^(n+k)*binomial(2*n, k)^5.
Terms
- a(0) =1a(1) =30a(2) =5730a(3) =1696800a(4) =613591650a(5) =248832363780
External references
- oeis: A050984