Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 110-111-011 pattern in any orientation.
A146251
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 110-111-011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =9a(5) =19a(6) =71a(7) =265a(8) =1031a(9) =4533a(10) =26975a(11) =188011a(12) =1487007a(13) =13567107a(14) =149156483a(15) =1938922129a(16) =29541083501a(17) =528608677059
External references
- oeis: A146251