T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum.

A257270

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum.

Terms

    a(0) =9300a(1) =119716a(2) =119716a(3) =1257600a(4) =2292196a(5) =1257600a(6) =13089924a(7) =29746116a(8) =29746116a(9) =13089924a(10) =121905264a(11) =380991361a(12) =358153488a(13) =380991361a(14) =121905264a(15) =1125468304a(16) =3966480400a(17) =4497848356a(18) =4497848356a(19) =3966480400a(20) =1125468304a(21) =9711591328

External references