Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.
A252194
Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.
Terms
- a(0) =441a(1) =585a(2) =970a(3) =1642a(4) =2931a(5) =5316a(6) =10074a(7) =19529a(8) =38353a(9) =76314a(10) =153452a(11) =311237a(12) =636604a(13) =1310403a(14) =2712616a(15) =5647056a(16) =11816544a(17) =24840843a(18) =52448289a(19) =111189719a(20) =236610322a(21) =505256872a(22) =1082373985a(23) =2325479451a(24) =5009653060a(25) =10818218460a(26) =23412891526
External references
- oeis: A252194