Number of ways to quarter a 2n+1 X 2n+1 chessboard with central square removed.
A272070
Number of ways to quarter a 2n+1 X 2n+1 chessboard with central square removed.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =104a(4) =3970a(5) =431932a(6) =137066448a(7) =128095791922
External references
- oeis: A272070