T(n,k) = Number of (n+2) X (k+2) 0..1 arrays with every 3 X 3 subblock sum of the two maximums of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A254260
T(n,k) = Number of (n+2) X (k+2) 0..1 arrays with every 3 X 3 subblock sum of the two maximums of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =512a(1) =2812a(2) =2812a(3) =12616a(4) =14681a(5) =12616a(6) =54236a(7) =72644a(8) =59531a(9) =54236a(10) =236024a(11) =382316a(12) =268900a(13) =223357a(14) =236024a(15) =1021428a(16) =1989857a(17) =1420232a(18) =718226a(19) =888391a(20) =1021428a(21) =4351908a(22) =10193041a(23) =7815717a(24) =2983064a(25) =2192422a(26) =3647288a(27) =4351908a(28) =18369164
External references
- oeis: A254260