Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1110-0110-0111 pattern in any orientation.
A147499
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1110-0110-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =9a(9) =9a(10) =25a(11) =25a(12) =57a(13) =57a(14) =501a(15) =501a(16) =8327a(17) =8327a(18) =120657a(19) =120657a(20) =1392679a(21) =1392679a(22) =36251459a(23) =36251459a(24) =1768772831a(25) =1768772831
External references
- oeis: A147499