Number of (n+2) X (2+2) 0..1 arrays with every 3 X 3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

A255030

Number of (n+2) X (2+2) 0..1 arrays with every 3 X 3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

Terms

    a(0) =2554a(1) =9492a(2) =33778a(3) =87907a(4) =196724a(5) =407885a(6) =794663a(7) =1460513a(8) =2583757a(9) =4473909a(10) =7580232a(11) =12566584a(12) =20578851a(13) =33488585a(14) =53933411a(15) =86021960a(16) =136821479a(17) =217262237a(18) =342983060a(19) =539386487a(20) =849243443a(21) =1336448972a(22) =2095677481

External references