Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 11100-00100-00111 pattern in any orientation.

A147254

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 11100-00100-00111 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =5a(6) =21a(7) =29a(8) =145a(9) =485a(10) =3243a(11) =11105a(12) =102013a(13) =454621a(14) =6519613a(15) =40834561a(16) =722449417

External references