Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.
A253319
Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.
Terms
- a(0) =16a(1) =126a(2) =1217a(3) =7744a(4) =58505a(5) =283804a(6) =1660088a(7) =6753250a(8) =32941939a(9) =123940122a(10) =544975707a(11) =2033911736a(12) =8556436417a(13) =32990467558a(14) =137911795230
External references
- oeis: A253319