Number of (n+2) X (1+2) 0..1 arrays with every 3 X 3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A254900
Number of (n+2) X (1+2) 0..1 arrays with every 3 X 3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =512a(1) =2423a(2) =7579a(3) =22901a(4) =72249a(5) =219706a(6) =616608a(7) =1656147a(8) =4391684a(9) =11530065a(10) =29828022a(11) =76080145a(12) =191906132a(13) =479966380a(14) =1193306087a(15) =2951733688a(16) =7264247735a(17) =17792959607a(18) =43422206773a(19) =105672171019a(20) =256535475334a(21) =621345009200
External references
- oeis: A254900