Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
A252421
Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
Terms
- a(0) =3719a(1) =7186a(2) =30724a(3) =62288a(4) =365974a(5) =1757580a(6) =3582225a(7) =21882869a(8) =107926383a(9) =220463165a(10) =1375056342a(11) =6880842955a(12) =14073466867a(13) =88795680194a(14) =447871169161a(15) =916696939171
External references
- oeis: A252421