Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0110-1111-0110 pattern in any orientation.
A146920
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0110-1111-0110 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =7a(7) =14a(8) =36a(9) =103a(10) =399a(11) =1984a(12) =10103a(13) =56582a(14) =376480a(15) =2975286a(16) =28776438a(17) =327464795a(18) =4166314264a(19) =60832319172
External references
- oeis: A146920