Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7.
A252580
Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7.
Terms
- a(0) =4583a(1) =17261a(2) =96099a(3) =263046a(4) =1887578a(5) =11285381a(6) =31059674a(7) =225598956a(8) =1361132361a(9) =3729210396a(10) =27362165487a(11) =166198069299a(12) =453536490301
External references
- oeis: A252580