Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0110-0011 pattern in any orientation.
A146447
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0110-0011 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) =33a(11) =33a(12) =185a(13) =185a(14) =1861a(15) =1861a(16) =35285a(17) =35285a(18) =845657a(19) =845657a(20) =28275879a(21) =28275879a(22) =1543673839a(23) =1543673839a(24) =135800422841a(25) =135800422841
External references
- oeis: A146447