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 A039939 #8 Apr 27 2017 19:24:55 %S A039939 8,84,284,2842,8937,8964,8964,85964,89641,89641,89641,89729,296984, %T A039939 429817,897299,897299,897299,897299,897299,897299,897299,897299, %U A039939 897299,8697299,9897947,9929817,9929817,9929817,9929817,9929817,9929817 %N A039939 Smallest k for which k, 2k, ... nk all contain the digit 8. %H A039939 Giovanni Resta, <a href="/A039939/b039939.txt">Table of n, a(n) for n = 1..262</a> %e A039939 a(2)=84 since 84 and 168 contain a 8. %Y A039939 Cf. A039932, A039933, A039934, A039935, A039936, A039937, A039938, A039940. %K A039939 base,nonn %O A039939 1,1 %A A039939 _Erich Friedman_ %E A039939 More terms from _Patrick De Geest_, Oct 15 1999