Number of (n+1)X(n+1) 0..2 arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.
A187630
Number of (n+1)X(n+1) 0..2 arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.
Terms
- a(0) =31a(1) =446a(2) =1648a(3) =557382a(4) =672698a(5) =21411605018a(6) =22329564088
External references
- oeis: A187630