a(n) = ((n+1)^(n-1) - (n-1)^(n-1))/2 for n>=1.
A274278
a(n) = ((n+1)^(n-1) - (n-1)^(n-1))/2 for n>=1.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =6a(4) =49a(5) =520a(6) =6841a(7) =107744a(8) =1979713a(9) =41611392a(10) =985263601a(11) =25958682112a(12) =753424361713
External references
- oeis: A274278