Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0111-0010 pattern in any orientation.
A146455
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0111-0010 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) =57a(11) =57a(12) =533a(13) =533a(14) =9707a(15) =9707a(16) =296859a(17) =296859a(18) =11801387a(19) =11801387a(20) =824137549a(21) =824137549a(22) =100677999633a(23) =100677999633
External references
- oeis: A146455