T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 3.

A252447

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 3.

Terms

    a(0) =339a(1) =1677a(2) =1677a(3) =9062a(4) =13777a(5) =9062a(6) =48658a(7) =131202a(8) =131202a(9) =48658a(10) =259257a(11) =1149386a(12) =2091042a(13) =1149386a(14) =259257a(15) =1382414a(16) =10157387a(17) =30491181a(18) =30491181a(19) =10157387a(20) =1382414a(21) =7389034a(22) =91120655a(23) =454665875a(24) =732217984a(25) =454665875a(26) =91120655a(27) =7389034

External references