Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum unequal to 4 or 5 and every diagonal and antidiagonal sum equal to 4 or 5.
A251897
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum unequal to 4 or 5 and every diagonal and antidiagonal sum equal to 4 or 5.
Terms
- a(0) =1652a(1) =1548a(2) =1536a(3) =4208a(4) =30504a(5) =120984a(6) =325504a(7) =4618864a(8) =31618896a(9) =127303080a(10) =3373936496a(11) =34737558232a(12) =215577492448
External references
- oeis: A251897