Number of 4X4 0..n arrays with each 2X2 subblock off diagonal and antidiagonal nonsingular and the array of 2X2 subblock determinants antisymmetric about the diagonal and antidiagonal.
A187707
Number of 4X4 0..n arrays with each 2X2 subblock off diagonal and antidiagonal nonsingular and the array of 2X2 subblock determinants antisymmetric about the diagonal and antidiagonal.
Terms
- a(0) =2a(1) =72a(2) =322a(3) =1718a(4) =2904a(5) =9834a(6) =13324a(7) =31000a(8) =49910a(9) =84760a(10) =98226a(11) =211526a(12) =234336a(13) =325654a(14) =454612a(15) =691052a(16) =742006a(17) =1152832a(18) =1224538a(19) =1765938
External references
- oeis: A187707