Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A253488
Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =81a(1) =1377a(2) =4196a(3) =10477a(4) =32652a(5) =113573a(6) =415106a(7) =1561268a(8) =5980490a(9) =23190284a(10) =90686546a(11) =356759588a(12) =1409549210a(13) =5586667004
External references
- oeis: A253488