Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111-0100 pattern in any orientation.
A146588
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111-0100 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) =49a(11) =49a(12) =301a(13) =301a(14) =4891a(15) =4891a(16) =104131a(17) =104131a(18) =3555075a(19) =3555075a(20) =179509487a(21) =179509487a(22) =14641599949
External references
- oeis: A146588