Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-00100-11111 pattern in any orientation.
A147319
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-00100-11111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =9a(7) =1a(8) =50a(9) =19a(10) =1045a(11) =405a(12) =26459a(13) =5465a(14) =942760a(15) =98073a(16) =47165993a(17) =3767543a(18) =4686396466a(19) =402496574a(20) =955119646127a(21) =74080050007
External references
- oeis: A147319