Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
A253741
Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
Terms
- a(0) =81a(1) =2723a(2) =77414a(3) =1143174a(4) =10966149a(5) =64166071a(6) =333213583a(7) =1343634212a(8) =4751131685a(9) =14311629354a(10) =39554854483a(11) =98216242368a(12) =227147255700a(13) =487878952466a(14) =998933350773
External references
- oeis: A253741