Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.
A252106
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.
Terms
- a(0) =1417a(1) =1424a(2) =554a(3) =1314a(4) =3528a(5) =9834a(6) =33216a(7) =252160a(8) =1017408a(9) =4251648a(10) =95453184a(11) =461119488a(12) =2176843776a(13) =165104582656a(14) =884163477504
External references
- oeis: A252106