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%I #10 Apr 10 2020 21:42:19
%S 0,9,27,45,63,81,99,117,135,153,154,157,160,163,166,169,172,175,178,
%T 180,207,234,261,288,315,342,369,396,397,400,403,406,409,412,415,418,
%U 421,423,450,477,504,531,558,585,612,639,640,643
%N Position of n-th 0 in A031087.
%K nonn
%O 1,2
%A _Clark Kimberling_
%E Missing a(1)=0 inserted by _Sean A. Irvine_, Apr 10 2020