Number of (2+2)X(n+2) 0..1 arrays with every 3X3 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.
A254261
Number of (2+2)X(n+2) 0..1 arrays with every 3X3 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) =2812a(1) =14681a(2) =72644a(3) =382316a(4) =1989857a(5) =10193041a(6) =52034327a(7) =264149081a(8) =1335877880a(9) =6740946572a(10) =33935560584a(11) =170530735088a(12) =855637004145
External references
- oeis: A254261