Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 110-111-101 pattern in any orientation.
A146262
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 110-111-101 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =9a(7) =33a(8) =57a(9) =93a(10) =311a(11) =1101a(12) =3499a(13) =17317a(14) =84175a(15) =569419a(16) =2944127a(17) =17772493a(18) =117896615a(19) =988499111a(20) =8301329001a(21) =91569781875
External references
- oeis: A146262