Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1111-0001 pattern in any orientation.
A146850
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =17a(7) =37a(8) =137a(9) =741a(10) =5145a(11) =37997a(12) =337079a(13) =3889419a(14) =55427643a(15) =967896983a(16) =20644031605a(17) =543669795557
External references
- oeis: A146850