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%I #16 Dec 20 2020 03:35:52
%S 1,1,1,2,4,8,14,26,44,76,125,206,327,521,802,1231,1845,2742,3987,5748,
%T 8124,11364,15615,21212,28336,37412,48597,62368,78810,98359,120910,
%U 146797,175601,207443,241515,277666,314674,352152,388503
%N Number of 4-ary rooted trees with n nodes and height at most 4.
%H Sean A. Irvine, <a href="/A036609/b036609.txt">Table of n, a(n) for n = 0..84</a>
%H E. M. Rains and N. J. A. Sloane, <a href="https://cs.uwaterloo.ca/journals/JIS/cayley.html">On Cayley's Enumeration of Alkanes (or 4-Valent Trees)</a>, J. Integer Sequences, Vol. 2 (1999), Article 99.1.1.
%H <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a>
%K nonn,fini,full
%O 0,4
%A _N. J. A. Sloane_.
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