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 A061823 #5 Dec 05 2013 19:54:52 %S A061823 0,7,14,21,35,42,56,63,70,77,105,112,126,133,140,147,154,161,175,203, %T A061823 210,217,224,231,245,252,266,273,301,315,322,336,343,350,357,364,371, %U A061823 406,413,420,427,434,441,455,462,476,504,511,525,532,546,553,560,567,574 %N A061823 Multiples of 7 containing only digits 0,...,7. %H A061823 Enrique Pérez Herrero, <a href="/A061823/b061823.txt">Table of n, a(n) for n = 1..5000</a> %e A061823 147 =7*21, is a term containing digits less than 8. %t A061823 Select[7*Range[0,2000],Max[IntegerDigits[#]]<=7&] (* _Enrique Pérez Herrero_, May 13 2012 *) %Y A061823 A061818, A061819, A061820, A061821, A061822. %K A061823 nonn,base,easy %O A061823 1,2 %A A061823 _Amarnath Murthy_, May 28 2001 %E A061823 Corrected and extended by Larry Reeves (larryr(AT)acm.org), May 30 2001