Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11000-01110-00011 pattern in any orientation.
A147187
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11000-01110-00011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =13a(11) =13a(12) =61a(13) =61a(14) =329a(15) =329a(16) =2787a(17) =2787a(18) =39701a(19) =39701a(20) =747265a(21) =747265a(22) =18941331a(23) =18941331a(24) =668354617a(25) =668354617
External references
- oeis: A147187