Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1111-0110 pattern in any orientation.
A146612
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1111-0110 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) =4465a(15) =4465a(16) =97649a(17) =97649a(18) =2836795a(19) =2836795a(20) =117091945a(21) =117091945
External references
- oeis: A146612