%I M4102 #15 Jun 21 2017 10:12:37
%S 1,6,12,96,1560,4848,28848,248352,1446240,12905664,99071040,649236480,
%T 4924099200,49007023872,304778309376,2301818168832,18389782387200,
%U 138110895596544,1094304243348480,8691945066848256,68039592521668608
%N Number of symmetries in planted (1,4) trees on 3n-1 vertices.
%D Kathleen A. McKeon, The expected number of symmetries in locally-restricted trees I, pp. 849-860 of Y. Alavi et al., eds., Graph Theory, Combinatorics and Applications. Wiley, NY, 2 vols., 1991.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H Kathleen A. McKeon, <a href="/A003609/a003609.pdf">Letter to N. J. A. Sloane, July 25 1991</a>
%H Kathleen A. McKeon, <a href="/A003609/a003609_1.pdf">The expected number of symmetries in locally-restricted trees I</a>, pp. 849-860 of Y. Alavi et al., eds., Graph Theory, Combinatorics and Applications. Wiley, NY, 2 vols., 1991. [Annotated scanned copy]
%H <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a>
%H <a href="/index/Tra#trees">Index entries for sequences related to trees</a>
%K nonn
%O 1,2
%A _N. J. A. Sloane_, _Mira Bernstein_