Number of (n+2)X(3+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 or 4.

A252070

Number of (n+2)X(3+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 or 4.

Terms

    a(0) =183a(1) =419a(2) =1497a(3) =5085a(4) =17455a(5) =60245a(6) =206747a(7) =711749a(8) =2455039a(9) =8451165a(10) =29078125a(11) =100127009a(12) =344830169a(13) =1187280673a(14) =4087598979a(15) =14073866379a(16) =48459148697a(17) =166851565147a(18) =574482172193

External references