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 A061814 #6 Feb 15 2017 00:14:31 %S A061814 0,4,8,20,24,28,40,44,48,60,64,68,80,84,88,200,204,208,220,224,228, %T A061814 240,244,248,260,264,268,280,284,288,400,404,408,420,424,428,440,444, %U A061814 448,460,464,468,480,484,488,600,604,608,620,624,628,640,644,648,660,664,668,680,684,688 %N A061814 Multiples of 4 containing only even digits. %H A061814 Harvey P. Dale, <a href="/A061814/b061814.txt">Table of n, a(n) for n = 0..1000</a> %H A061814 <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>. %e A061814 244 is a term 244 = 4*61 %t A061814 Select[4*Range[0,200],AllTrue[IntegerDigits[#],EvenQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* _Harvey P. Dale_, Jul 02 2016 *) %o A061814 (PARI) is(n)=n%4==0 && #setintersect(Set(digits(n)), [1,3,5,7,9])==0 \\ _Charles R Greathouse IV_, Feb 15 2017 %Y A061814 Cf. A014263. %K A061814 nonn,base,easy %O A061814 0,2 %A A061814 _Amarnath Murthy_, May 28 2001