Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected in a 3X2 elbow 1,1 1,2 1,3 2,3 in any orientation.
A145950
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected in a 3X2 elbow 1,1 1,2 1,3 2,3 in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =9a(4) =31a(5) =205a(6) =1307a(7) =12227a(8) =171281a(9) =3266929a(10) =85166971a(11) =3120438693a(12) =149314103237
External references
- oeis: A145950