0,4
E. M. Rains and N. J. A. Sloane, On Cayley's Enumeration of Alkanes (or 4-Valent Trees), J. Integer Sequences, Vol. 2 (1999), Article 99.1.1.
Index entries for sequences related to rooted trees
If T_i(z) = g.f. for ternary trees of height at most i, T_{i+1}(z)=1+z*(T_i(z)^3/6+T_i(z^2)*T_i(z)/2+T_i(z^3)/3); T_0(z) = 1.
Sequence in context: A049312 A132043 A055545 this_sequence A036376 A000598 A003008
Adjacent sequences: A036372 A036373 A036374 this_sequence A036376 A036377 A036378
nonn,fini
N. J. A. Sloane (njas(AT)research.att.com), E. M. Rains (rains(AT)caltech.edu)
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