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%I #7 Oct 07 2023 21:40:13
%S 9,18,20,27,36,45,54,60,63,72,80,81,90,99,108,117,126,135,144,153,162,
%T 171,180,189,198,207,216,225,234,240,243,252,261,270,279,288,297,306,
%U 315,324,333,338,342,351,360,369,378,387,396,405,414,423,432,441,450,459,468,477,486,495,504,513,522,531,540,549
%N Positions of zeros in A365711, where A365711 is the Dirichlet inverse of balanced ternary enumeration of integers (A117966).
%C Apparently, if n is included, then 3*n is also included.
%o (PARI) isA366290(n) = A366289(n);
%Y Cf. A117966, A365711, A366289 (characteristic function).
%Y Positions of 5's in A366293.
%Y Subsequence of A366288.
%K nonn
%O 1,1
%A _Antti Karttunen_, Oct 07 2023