Number of 4X4 0..n arrays with all the 2X2 subblocks nonsingular and the array of 2X2 subblock determinants symmetric.
A187464
Number of 4X4 0..n arrays with all the 2X2 subblocks nonsingular and the array of 2X2 subblock determinants symmetric.
Terms
- a(0) =144a(1) =89618a(2) =5098224a(3) =100936174a(4) =1061948616a(5) =7706500654a(6) =41131010240a(7) =180898687166a(8) =670434819776
External references
- oeis: A187464