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 4 or 5.
A251909
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 4 or 5.
Terms
- a(0) =9552a(1) =87472a(2) =87472a(3) =910694a(4) =1524496a(5) =910694a(6) =9385210a(7) =31829596a(8) =31829596a(9) =9385210a(10) =97416802a(11) =634891856a(12) =1346875728a(13) =634891856a(14) =97416802a(15) =1020849168a(16) =13021221976a(17) =55159959296a(18) =55159959296a(19) =13021221976a(20) =1020849168a(21) =10715275730
External references
- oeis: A251909