This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A043374 #12 Apr 24 2021 02:04:58 %S A043374 7,37,42,44,45,46,47,49,55,61,67,79,115,151,187,217,222,224,225,226, %T A043374 227,229,235,241,247,252,254,255,256,257,264,266,267,268,269,270,272, %U A043374 273,274,275,276,278,279,280,281,282,284,285,286 %N A043374 Numbers having two 1's in base 6. %t A043374 Select[Range[300],DigitCount[#,6,1]==2&] (* _Harvey P. Dale_, Jan 22 2015 *) %Y A043374 Cf. A007092. %K A043374 nonn,base %O A043374 1,1 %A A043374 _Clark Kimberling_