Number of (n+1)X4 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.
A205022
Number of (n+1)X4 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.
Terms
- a(0) =15040a(1) =275853a(2) =7148335a(3) =198539736a(4) =5296848762a(5) =139786868632
External references
- oeis: A205022