Number of (n+1)X2 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.
A205020
Number of (n+1)X2 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.
Terms
- a(0) =256a(1) =2338a(2) =15040a(3) =84899a(4) =456043a(5) =2470216a(6) =13615376a(7) =76027865a(8) =427451825a(9) =2411941887a(10) =13634285159a(11) =77146583419a(12) =436735262905
External references
- oeis: A205020