Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 5-point barb 1,1 1,2 2,2 2,3 3,2 in any orientation.
A146139
Number of n X n binary arrays symmetric about main diagonal 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) =7a(5) =21a(6) =61a(7) =403a(8) =3415a(9) =36395a(10) =473261a(11) =8291363a(12) =204964495a(13) =6738662861a(14) =291876652529
External references
- oeis: A146139