a(n) = Product_{k=1..n} (binomial(k-1,3) + binomial(n-k,3)).
A323496
a(n) = Product_{k=1..n} (binomial(k-1,3) + binomial(n-k,3)).
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =1600a(7) =1280000a(8) =1225000000
External references
- oeis: A323496