Number of 5X5 0..n arrays with each 2X2 subblock determinant nonzero and the array of 2X2 subblock determinants symmetric under 90 degree rotation.

A187531

Number of 5X5 0..n arrays with each 2X2 subblock determinant nonzero and the array of 2X2 subblock determinants symmetric under 90 degree rotation.

Terms

    a(0) =0a(1) =1476a(2) =20554a(3) =273102a(4) =992410a(5) =5880944

External references