Number of (n+2)X(2+2) 0..1 arrays with every 3X3 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.

A254901

Number of (n+2)X(2+2) 0..1 arrays with every 3X3 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) =2423a(1) =5939a(2) =13444a(3) =36387a(4) =81620a(5) =146168a(6) =268310a(7) =501323a(8) =877772a(9) =1500214a(10) =2577866a(11) =4340587a(12) =7207565a(13) =11943999a(14) =19714780a(15) =32343730a(16) =52955133a(17) =86341286a(18) =140200593a(19) =227653644a(20) =369372492a(21) =597897682a(22) =966780341a(23) =1562278934a(24) =2521602334

External references