Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7.
A252246
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7.
Terms
- a(0) =318a(1) =239a(2) =231a(3) =267a(4) =327a(5) =405a(6) =501a(7) =657a(8) =861a(9) =1113a(10) =1521a(11) =2055a(12) =2715a(13) =3783a(14) =5181a(15) =6909a(16) =9705a(17) =13365a(18) =17889a(19) =25209a(20) =34791a(21) =46635a(22) =65799
External references
- oeis: A252246