Number of unoriented series-parallel networks with n elements of 2 colors.
A339280
Number of unoriented series-parallel networks with n elements of 2 colors.
Terms
- a(0) =2a(1) =6a(2) =22a(3) =106a(4) =582a(5) =3622a(6) =24060a(7) =167803a(8) =1206852a(9) =8881775a(10) =66496238a(11) =504729590a(12) =3874281594a(13) =30020527274a(14) =234498941338
External references
- oeis: A339280