Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 110-111-100 pattern in any orientation.
A146182
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 110-111-100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =9a(7) =9a(8) =33a(9) =33a(10) =113a(11) =113a(12) =1711a(13) =1711a(14) =59971a(15) =59971a(16) =1694043a(17) =1694043a(18) =74822217a(19) =74822217a(20) =7821008273a(21) =7821008273
External references
- oeis: A146182