Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10000-11100-00111-00001 pattern in any orientation.
A147377
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10000-11100-00111-00001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =11a(9) =15a(10) =241a(11) =427a(12) =4185a(13) =8653a(14) =87751a(15) =203323a(16) =3730869a(17) =9866343a(18) =357089469a(19) =1093277721a(20) =68995024703a(21) =247016437881
External references
- oeis: A147377