Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01000-11100-00111-00010 pattern in any orientation.
A147333
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01000-11100-00111-00010 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) =249a(11) =439a(12) =3525a(13) =7243a(14) =86415a(15) =202083a(16) =5858179a(17) =16166669a(18) =860820947a(19) =2825911051a(20) =229675621375a(21) =888780016627
External references
- oeis: A147333