Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0111-0110 pattern in any orientation.
A146672
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0111-0110 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =19a(8) =43a(9) =71a(10) =159a(11) =607a(12) =2057a(13) =8951a(14) =43111a(15) =227107a(16) =1266527a(17) =7483327a(18) =50232185a(19) =389882233a(20) =3353662007
External references
- oeis: A146672