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 A084020 #3 Dec 05 2013 19:56:16 %S A084020 1,3,6,8,9,11,33,66,88,90,96,98,99,111,333,666,888,962,972,990,996, %T A084020 998,999,1111,3333,6666,8888,9090,9696,9898,9900,9966,9988,9990,9996, %U A084020 9998,9999 %N A084020 Numbers which are either a divisor or a multiple of their 9's complement. %Y A084020 Cf. A002113, A084019. %K A084020 base,easy,nonn %O A084020 1,2 %A A084020 _Amarnath Murthy_, May 23 2003 %E A084020 Corrected and extended by _Giovanni Resta_, Jun 06 2003