Number of (n+1)X(1+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.

A258547

Number of (n+1)X(1+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.

Terms

    a(0) =16a(1) =44a(2) =104a(3) =228a(4) =480a(5) =988a(6) =2008a(7) =4052a(8) =8144a(9) =16332a(10) =32712a(11) =65476a(12) =131008a(13) =262076a(14) =524216a(15) =1048500a(16) =2097072a(17) =4194220a(18) =8388520a(19) =16777124a(20) =33554336a(21) =67108764a(22) =134217624a(23) =268435348a(24) =536870800a(25) =1073741708a(26) =2147483528a(27) =4294967172

External references