Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 2 3 4 6 or 7.
A252166
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 2 3 4 6 or 7.
Terms
- a(0) =37337a(1) =12842a(2) =46233a(3) =170398a(4) =874123a(5) =3444924a(6) =13087197a(7) =69021164a(8) =272148070a(9) =1031454085a(10) =5527138496a(11) =21748536917a(12) =82643571143a(13) =445618059415
External references
- oeis: A252166