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 A212495 #18 May 03 2018 09:24:04
%S A212495 0,2,4,6,8,10,22,24,26,28,30,32,44,46,48,50,52,54,66,68,70,72,74,76,
%T A212495 88,90,92,94,96,98,110,112,114,116,118,120,242,244,246,248,250,252,
%U A212495 264,266,268,270,272,274,286,288,290,292,294,296,308,310,312,314,316
%N A212495 Numbers all of whose base 11 digits are even.
%C A212495 Similar in definition to A033036.
%C A212495 As n increases, it is most likely that A212495(n) < A033036(n), although exceptions to this rule can be found. I conjecture that A212495(n) > A033036(n) for only finitely many values of n.
%e A212495 30 is represented by "28" in base 11. Both digits in this representation are even, thus 30 belongs to the sequence.
%t A212495 Select[Range[0,350],AllTrue[IntegerDigits[#,11],EvenQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* _Harvey P. Dale_, May 03 2018 *)
%o A212495 (PARI) {is(c) = local(d);while(c != 0, d=c%11; c=(c-d)/11; if(d%2==1, return(0))) ; 1}
%o A212495 for(i=0, 317, if(is(i), print1(i, ", ")))
%K A212495 nonn,base,easy
%O A212495 1,2
%A A212495 _Douglas Latimer_, May 18 2012