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

A258556

Number of (3+1) X (n+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) =296a(2) =598a(3) =985a(4) =1403a(5) =1917a(6) =2542a(7) =3222a(8) =3940a(9) =4767a(10) =5718a(11) =6737a(12) =7807a(13) =8999a(14) =10328a(15) =11738a(16) =13212a(17) =14821a(18) =16580a(19) =18433a(20) =20363a(21) =22441a(22) =24682a(23) =27030a(24) =29468a(25) =32067a(26) =34842a(27) =37737a(28) =40735a(29) =43907

External references