Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1101-0111-0100 pattern in any orientation.
A146858
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1101-0111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =17a(7) =43a(8) =153a(9) =711a(10) =4787a(11) =36997a(12) =323223a(13) =3456487a(14) =47029493a(15) =778875019a(16) =15666901145a(17) =390119856899
External references
- oeis: A146858