Number of (n+1)X(n+1) 0..2 arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation.
A187622
Number of (n+1)X(n+1) 0..2 arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation.
Terms
- a(0) =31a(1) =446a(2) =60a(3) =324452a(4) =70548a(5) =6090023738a(6) =720252796
External references
- oeis: A187622