Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 5-point barb 1,1 1,2 2,2 2,3 3,2 in any orientation.
A146137
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 5-point barb 1,1 1,2 2,2 2,3 3,2 in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =149a(7) =307a(8) =3283a(9) =9637a(10) =237685a(11) =792401a(12) =149008323a(13) =690862749a(14) =219427051049
External references
- oeis: A146137