Number of (n+1) X (3+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.

A258549

Number of (n+1) X (3+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.

Terms

    a(0) =104a(1) =210a(2) =598a(3) =1244a(4) =2384a(5) =3980a(6) =6348a(7) =9567a(8) =13847a(9) =19227a(10) =26071a(11) =34506a(12) =44790a(13) =57010a(14) =71578a(15) =88669a(16) =108589a(17) =131473a(18) =157781a(19) =187736a(20) =221692a(21) =259832a(22) =302664a(23) =350459a(24) =403619a(25) =462375a(26) =527283a(27) =598662a(28) =676962a(29) =762462

External references