Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation.
A146064
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =49a(7) =91a(8) =755a(9) =1733a(10) =17237a(11) =43939a(12) =2178205a(13) =7075949a(14) =921596877a(15) =3869156215a(16) =535678119399
External references
- oeis: A146064