Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 1 3 4 6 or 7.
A252204
Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 1 3 4 6 or 7.
Terms
- a(0) =4743a(1) =5178a(2) =17276a(3) =44322a(4) =215814a(5) =932474a(6) =2568954a(7) =12883538a(8) =56985498a(9) =157484310a(10) =797509638a(11) =3566734178a(12) =9868152522a(13) =50206875026a(14) =225779395146a(15) =624968086326
External references
- oeis: A252204