Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A254805
Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =2700a(1) =10484a(2) =40167a(3) =121701a(4) =426308a(5) =1351487a(6) =4771368a(7) =16058526a(8) =56235160a(9) =192884364a(10) =669557257a(11) =2305588750a(12) =7958763182a(13) =27396735121a(14) =94312947300a(15) =324414828833
External references
- oeis: A254805