|
%I #16 Apr 23 2023 21:59:34
%S 57,351,393,399,401,402,403,404,405,407,414,421,428,435,449,498,547,
%T 596,645,743,1086,1429,1772,2115,2409,2451,2457,2459,2460,2461,2462,
%U 2463,2465,2472,2479,2486,2493,2507,2556,2605,2654
%N Numbers whose base-7 representation contains exactly three 1's.
%H Harvey P. Dale, <a href="/A043399/b043399.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Range[3000],DigitCount[#,7,1]==3&] (* _Harvey P. Dale_, Dec 06 2012 *)
%Y Cf. A007093.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
|
