Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-111-111 pattern in any orientation.
A146279
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-111-111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =13a(6) =51a(7) =211a(8) =749a(9) =2651a(10) =19761a(11) =133713a(12) =1247055a(13) =13243557a(14) =208954265a(15) =3004516121a(16) =57775455787
External references
- oeis: A146279