Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation.
A146070
Number of n X n binary arrays symmetric under 180 degree rotation 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) =5a(3) =1a(4) =9a(5) =25a(6) =101a(7) =401a(8) =3215a(9) =13761a(10) =224503a(11) =1483715a(12) =30996399a(13) =381934429a(14) =12283193557a(15) =226607791453
External references
- oeis: A146070