a(n) = Sum_{k=0..n} (n-i)^k * (n+i)^(n-k), where i is the imaginary unit.
A387459
a(n) = Sum_{k=0..n} (n-i)^k * (n+i)^(n-k), where i is the imaginary unit.
Terms
- a(0) =1a(1) =2a(2) =11a(3) =96a(4) =1121a(5) =16280a(6) =281987a(7) =5666304a(8) =129488641a(9) =3315041568a(10) =93958705499
External references
- oeis: A387459