T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 or 6.
A252325
T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 or 6.
Terms
- a(0) =12726a(1) =94578a(2) =94578a(3) =723110a(4) =797008a(5) =723110a(6) =5618854a(7) =7391236a(8) =7391236a(9) =5618854a(10) =44203794a(11) =70847984a(12) =96651850a(13) =70847984a(14) =44203794a(15) =348767254a(16) =727750076a(17) =1374911658a(18) =1374911658a(19) =727750076a(20) =348767254a(21) =2755444362a(22) =7593834452
External references
- oeis: A252325