Number of (n+1)X(n+1) 0..1 arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation.
A187621
Number of (n+1)X(n+1) 0..1 arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation.
Terms
- a(0) =10a(1) =24a(2) =2a(3) =948a(4) =36a(5) =190972a(6) =3020a(7) =194618700a(8) =929380a(10) =1744283776
External references
- oeis: A187621