Number of unordered pairs of edge-disjoint trees on n labeled vertices.
A291953
Number of unordered pairs of edge-disjoint trees on n labeled vertices.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =6a(4) =570a(5) =73620a(6) =13675620a(7) =3540401760
External references
- oeis: A291953