Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 1 3 4 6 or 7.
A252237
Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 1 3 4 6 or 7.
Terms
- a(0) =858a(1) =3896a(2) =16056a(3) =43848a(4) =215424a(5) =932024a(6) =2568432a(7) =12882368a(8) =56984208a(9) =157483872a(10) =797509248a(11) =3566733728a(12) =9868152000a(13) =50206873856a(14) =225779393856a(15) =624968085888
External references
- oeis: A252237