Number of (4+1) X (n+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

A253438

Number of (4+1) X (n+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

Terms

    a(0) =109a(1) =108a(2) =121a(3) =156a(4) =228a(5) =372a(6) =660a(7) =1236a(8) =2388a(9) =4692a(10) =9300a(11) =18516a(12) =36948a(13) =73812a(14) =147540a(15) =294996a(16) =589908a(17) =1179732a(18) =2359380a(19) =4718676a(20) =9437268a(21) =18874452a(22) =37748820a(23) =75497556a(24) =150995028a(25) =301989972a(26) =603979860a(27) =1207959636a(28) =2415919188a(29) =4831838292

External references