Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1100-0111 pattern in any orientation.
A146693
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1100-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =9a(6) =23a(7) =49a(8) =265a(9) =1763a(10) =11689a(11) =76179a(12) =790941a(13) =10968467a(14) =170749547a(15) =2982674505a(16) =69135368821
External references
- oeis: A146693