Number of 4X4 0..n arrays with each 2X2 subblock nonsingular and the array of 2X2 subblock determinants symmetric about the diagonal and antidiagonal.
A187672
Number of 4X4 0..n arrays with each 2X2 subblock nonsingular and the array of 2X2 subblock determinants symmetric about the diagonal and antidiagonal.
Terms
- a(0) =112a(1) =11282a(2) =174292a(3) =1549398a(4) =6839146a(5) =32368980a(6) =88344978a(7) =268011840
External references
- oeis: A187672