Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

A255750

Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

Terms

    a(0) =2485a(1) =7765a(2) =20730a(3) =46367a(4) =86062a(5) =156658a(6) =290525a(7) =531182a(8) =940860a(9) =1668674a(10) =3031160a(11) =5597085a(12) =10094701a(13) =18262539a(14) =34114081a(15) =65352635a(16) =121376088a(17) =225653362a(18) =436223139a(19) =868777357a(20) =1663472667a(21) =3171906522a(22) =6300155508a(23) =12902328159

External references