Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1111 pattern in any orientation.
A146597
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =7a(6) =19a(7) =51a(8) =237a(9) =1335a(10) =8829a(11) =68891a(12) =649429a(13) =7839465a(14) =116522409a(15) =2129542541a(16) =47609599737
External references
- oeis: A146597