%I #14 Jan 27 2022 22:46:14
%S 6,3,3,6,6,3,6,3,6,3,3,3,3,3,6,3,3,3,6,3,3,3,3,3,6,6,3,3,6,3,3,6,3,6,
%T 3,3,3,6,3,6,3,6,6,3,3,6,3,6,6,6,3,3,3,3,6,6,3,6,3,3,3,6,6,6,3,6,3,3,
%U 6,6,6,3,6,6,3,3,6,3,3,3,6,3,3,6,3,6,3,3,6,6,3,3,6,3,3,6,3,3,6,3,6,3,6,3,6,3,3,3
%N If any power of 2 ends with k 3's and 6's, they must be the first k terms of this sequence in reverse order.
%H Ray Chandler, <a href="/A023407/b023407.txt">Table of n, a(n) for n = 1..10000</a>
%H Milan Janjic, <a href="http://www.pmfbl.org/janjic/">Enumerative Formulas for Some Functions on Finite Sets</a>
%F a(n) = 3*A023396(n).
%Y Cf. A023396.
%K nonn,base
%O 1,1
%A _David W. Wilson_