Triangle of the numbers of different forests of m unrooted trees of smallest order 2, i.e., without isolated vertices, on N labeled nodes.
A105786
Triangle of the numbers of different forests of m unrooted trees of smallest order 2, i.e., without isolated vertices, on N labeled nodes.
Terms
- a(0) =0a(1) =1a(2) =0a(3) =3a(4) =0a(5) =0a(6) =16a(7) =3a(8) =0a(9) =0a(10) =125a(11) =30a(12) =0a(13) =0a(14) =0a(15) =1296a(16) =330a(17) =15a(18) =0a(19) =0a(20) =0a(21) =16807a(22) =4305a(23) =315a(24) =0a(25) =0a(26) =0a(27) =0a(28) =262144a(29) =66248
External references
- oeis: A105786