Thanks to everyone who made a donation during our annual appeal! To see the list of donors, or make a donation, see the OEIS Foundation home page.
Number of unoriented linear forests with n nodes and 4 rooted trees.
Andrew Howroyd, Table of n, a(n) for n = 4..500
G.f.: (r(x)^4 + r(x^2)^2)/2 where r(x) is the g.f. of A000081.
Column 4 of A339303.
Sequence in context: A321573 A137103 A089586 * A045695 A106053 A121135
Adjacent sequences: A339299 A339300 A339301 * A339303 A339304 A339305
Andrew Howroyd, Dec 04 2020