Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1001-1111-1000 pattern in any orientation.
A146842
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1001-1111-1000 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =13a(7) =31a(8) =85a(9) =391a(10) =2235a(11) =16087a(12) =124573a(13) =1136363a(14) =12958205a(15) =185857105a(16) =3266797811a(17) =68594033643
External references
- oeis: A146842