Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1010-1111 pattern in any orientation.
A146809
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1010-1111 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) =65a(11) =65a(12) =349a(13) =349a(14) =3731a(15) =3731a(16) =77219a(17) =77219a(18) =2029815a(19) =2029815a(20) =63522619a(21) =63522619
External references
- oeis: A146809