Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the four sums of the central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically.

A254560

Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the four sums of the central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically.

Terms

    a(0) =512a(1) =10870a(2) =312322a(3) =2148260a(4) =10679860a(5) =67038844a(6) =206491388a(7) =1250249820a(8) =5063238114a(9) =28541610636a(10) =134752005110a(11) =745481127674

External references