Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically.
A253448
Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically.
Terms
- a(0) =81a(1) =1975a(2) =7782a(3) =15730a(4) =44242a(5) =147332a(6) =526430a(7) =1956194a(8) =7444718a(9) =28766354a(10) =112273790a(11) =441202754a(12) =1742089358
External references
- oeis: A253448