Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only either two adjacent vertically or two adjacent horizontally.
A145774
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only either two adjacent vertically or two adjacent horizontally.
Terms
- a(0) =1a(1) =3a(2) =5a(3) =18a(4) =124a(5) =889a(6) =9624a(7) =117592a(8) =3086899a(9) =71342470a(10) =3940302454a(11) =162484045629
External references
- oeis: A145774