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%I #9 Apr 29 2023 22:51:30
%S 1,1,2,3,3,3,3,3,4,5,5,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,8,9,9,10,11,11,
%T 11,11,11,12,13,13,14,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
%U 15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15
%N Number of numbers <= n having no 2 in ternary representation.
%C Partial sums of A039966: a(n) = Sum(A039966(k): 1<=k<=n).
%H N. J. A. Sloane, <a href="/A104406/b104406.txt">Table of n, a(n) for n = 1..10000</a>
%Y Cf. A005836, A004642, A039966.
%Y This is a lower bound for A003002.
%K nonn
%O 1,3
%A _Reinhard Zumkeller_, Mar 05 2005
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