Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1111-0101 pattern in any orientation.
A147181
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1111-0101 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =17a(7) =37a(8) =129a(9) =675a(10) =4545a(11) =33673a(12) =284663a(13) =3050875a(14) =41150087a(15) =686710451a(16) =13852947253a(17) =339116701643
External references
- oeis: A147181