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 A039940 #8 Apr 27 2017 18:42:37 %S A039940 9,49,97,98,98,99,99,99,99,99,99,499,992,993,993,994,994,994,995,995, %T A039940 995,995,996,996,996,996,996,997,997,997,997,997,997,997,997,997,997, %U A039940 998,998,998,998,998,998,998,998,998,998,998,998,998,998,998,998,998 %N A039940 Smallest k for which k, 2k, ... nk all contain the digit 9. %H A039940 Giovanni Resta, <a href="/A039940/b039940.txt">Table of n, a(n) for n = 1..10000</a> %e A039940 a(11)=99 since 99, 198, 297, 396, 495, 594, 693, 792, 891, 990, and 1089 all contain a 9. %Y A039940 Cf. A039932, A039933, A039934, A039935, A039936, A039937, A039938, A039939. %K A039940 base,nonn %O A039940 1,1 %A A039940 _Erich Friedman_ %E A039940 More terms from _Patrick De Geest_, Oct 15 1999