%I #13 Dec 24 2020 02:32:11
%S 0,0,0,0,0,0,0,0,0,1,8,43,188,720,2522,8288,25973,78506,230716,663100,
%T 1871936,5207632,14312497,38937270,105015752,281132871,747756946,
%U 1977633148,5204143935,13633435312,35572076796,92475463113,239606189255
%N Number of 4-ary rooted trees with n nodes and height exactly 9.
%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
%O 0,11
%A _N. J. A. Sloane_.