Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1010-1111-1000 pattern in any orientation.
A146644
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1010-1111-1000 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =17a(9) =17a(10) =53a(11) =53a(12) =329a(13) =329a(14) =3935a(15) =3935a(16) =73477a(17) =73477a(18) =2119711a(19) =2119711a(20) =76531381a(21) =76531381
External references
- oeis: A146644