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

A253155

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

Terms

    a(0) =109a(1) =120a(2) =129a(3) =164a(4) =236a(5) =380a(6) =668a(7) =1244a(8) =2396a(9) =4700a(10) =9308a(11) =18524a(12) =36956a(13) =73820a(14) =147548a(15) =295004a(16) =589916a(17) =1179740a(18) =2359388a(19) =4718684a(20) =9437276a(21) =18874460a(22) =37748828a(23) =75497564a(24) =150995036a(25) =301989980a(26) =603979868a(27) =1207959644a(28) =2415919196a(29) =4831838300

External references