Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only either four adjacent vertically or four adjacent horizontally.
A145790
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only either four adjacent vertically or four adjacent horizontally.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =9a(4) =11a(5) =36a(6) =65a(7) =515a(8) =2420a(9) =18065a(10) =172108a(11) =1981958a(12) =24609296a(13) =431265080a(14) =7420809238a(15) =183434050306
External references
- oeis: A145790