a(n) = (n^(n-1) + n^(n+1) - (n+1)^(n-1) - (n-1)^(n+1))/2.
A391717
a(n) = (n^(n-1) + n^(n+1) - (n+1)^(n-1) - (n-1)^(n+1))/2.
Terms
- a(0) =3a(1) =29a(2) =360a(3) =5429a(4) =96390a(5) =1970345a(6) =45589152a(7) =1178044649a(8) =33630496350
External references
- oeis: A391717