Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0111-1100-0111 pattern in any orientation.
A147371
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0111-1100-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =9a(7) =19a(8) =42a(9) =149a(10) =642a(11) =3217a(12) =16918a(13) =103595a(14) =764774a(15) =6743975a(16) =68369223a(17) =809162389a(18) =11357687762a(19) =186710566988
External references
- oeis: A147371