Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 101-111-100 pattern in any orientation.
A146190
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 101-111-100 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) =89a(11) =89a(12) =973a(13) =973a(14) =38577a(15) =38577a(16) =1078541a(17) =1078541a(18) =28644797a(19) =28644797a(20) =2049754535a(21) =2049754535a(22) =324959092887a(23) =324959092887
External references
- oeis: A146190