Number of 5X5 0..n arrays with all the 2X2 subblocks nonsingular and the array of 2X2 subblock determinants symmetric.
A187465
Number of 5X5 0..n arrays with all the 2X2 subblocks nonsingular and the array of 2X2 subblock determinants symmetric.
Terms
- a(0) =1272a(1) =11684688a(2) =3387715318a(3) =216668424092
External references
- oeis: A187465