a(n) = 16*(n-1)*a(n-1) + ((-1)^n)*(4/3)*Product_{k=0..n-1} (2*k-3) with a(0) = 0.
A302115
a(n) = 16*(n-1)*a(n-1) + ((-1)^n)*(4/3)*Product_{k=0..n-1} (2*k-3) with a(0) = 0.
Terms
- a(0) =0a(1) =4a(2) =68a(3) =2172a(4) =104268a(5) =6673092a(6) =533847780a(7) =51249383100
External references
- oeis: A302115