Number of (n+2)X(6+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.
A252165
Number of (n+2)X(6+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) =21186a(1) =6883a(2) =20753a(3) =67674a(4) =282255a(5) =1007913a(6) =3444924a(7) =14647117a(8) =52661401a(9) =182127968a(10) =775835591a(11) =2811986165a(12) =9812456922a(13) =41719396939a(14) =152097094855a(15) =534426043974
External references
- oeis: A252165