Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a tee 1,1 1,2 1,3 2,2 in any orientation.
A145932
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a tee 1,1 1,2 1,3 2,2 in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =20a(5) =85a(6) =428a(7) =3123a(8) =34838a(9) =454719a(10) =8335296a(11) =187056538a(12) =6169076015a(13) =247329264689
External references
- oeis: A145932