Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation.

A147326

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =9a(7) =1a(8) =54a(9) =15a(10) =1010a(11) =305a(12) =26482a(13) =3993a(14) =1090248a(15) =85931a(16) =79078189a(17) =4847983a(18) =11622838412a(19) =605747926a(21) =124132744693

External references