Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11000-01110-00011 pattern in any orientation.
A147188
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11000-01110-00011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =7a(7) =15a(8) =41a(9) =163a(10) =697a(11) =3471a(12) =20005a(13) =143359a(14) =1211791a(15) =12104355a(16) =142437683a(17) =2011344929a(18) =33622364965a(19) =665157511111
External references
- oeis: A147188