Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1111-0100 pattern in any orientation.
A147118
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =11a(7) =27a(8) =63a(9) =285a(10) =1745a(11) =11867a(12) =83339a(13) =729439a(14) =8174347a(15) =113015753a(16) =1872094927a(17) =37173405545a(18) =899575608439
External references
- oeis: A147118