T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3.
A251955
T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3.
Terms
- a(0) =2172a(1) =15246a(2) =15246a(3) =117100a(4) =188296a(5) =117100a(6) =922890a(7) =2723490a(8) =2723490a(9) =922890a(10) =7415658a(11) =41025310a(12) =78070792a(13) =41025310a(14) =7415658a(15) =60395332a(16) =641763520a(17) =2371536636a(18) =2371536636a(19) =641763520a(20) =60395332a(21) =495518534a(22) =10250030572
External references
- oeis: A251955