Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in an em 1,1 1,2 2,2 2,3 3,3 in any orientation.
A146145
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in an em 1,1 1,2 2,2 2,3 3,3 in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =55a(7) =103a(8) =1119a(9) =2577a(10) =44665a(11) =124149a(12) =7114043a(13) =25427717a(14) =3924887627a(15) =18243132743
External references
- oeis: A146145