Number of n X n binary arrays symmetric under horizontal reflection with all ones connected in a 3X2 elbow 1,1 1,2 1,3 2,3 in any orientation.
A145944
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected in a 3X2 elbow 1,1 1,2 1,3 2,3 in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =13a(5) =19a(6) =595a(7) =1473a(8) =41647a(9) =139371a(10) =13954303a(11) =64086157a(12) =18839470495a(13) =119460750005
External references
- oeis: A145944