%I #10 Feb 12 2021 18:05:14
%S 4,9,20,26,29,39,40,54,66,69,83,86,102,105,122,125,144,147,171,191,
%T 198,221,222,224,228,263,289,292,293,298,301,333,339,342,383,386,424,
%U 429,432,475,478,481,530,533,570,580,588,591,635
%N Numbers k such that A030727(k) = 2.
%Y Cf. A030727.
%K nonn
%O 1,1
%A _Clark Kimberling_
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