Number of 4X4 0..n arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation.
A187626
Number of 4X4 0..n arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation.
Terms
- a(0) =2a(1) =60a(2) =390a(3) =2146a(4) =5324a(5) =16042a(6) =28916a(7) =71012a(8) =121678a(9) =216768a(10) =302470a(11) =606282a(12) =785548
External references
- oeis: A187626