%I #15 Apr 23 2023 21:57:46
%S 40,89,138,187,236,250,257,264,271,278,280,281,282,283,284,286,292,
%T 334,383,432,481,530,579,593,600,607,614,621,623,624,625,626,627,629,
%U 635,677,726,775,824,873,922,936,943,950,957,964
%N Numbers whose base-7 representation contains exactly two 5's.
%t Select[Range[1000],DigitCount[#,7,5]==2&] (* _Harvey P. Dale_, Apr 03 2011 *)
%Y Cf. A007093.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
|