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 A061821 #5 Dec 05 2013 19:54:52 %S A061821 0,5,10,15,20,25,30,35,40,45,50,55,100,105,110,115,120,125,130,135, %T A061821 140,145,150,155,200,205,210,215,220,225,230,235,240,245,250,255,300, %U A061821 305,310,315,320,325,330,335,340,345,350,355,400,405,410,415,420,425,430 %N A061821 Multiples of 5 containing only digits 0,...,5. %e A061821 145 is a term containing digits less than 6. %t A061821 Select[5Range[0,90],Max[IntegerDigits[#]]<6&] (* _Harvey P. Dale_, May 02 2011 *) %Y A061821 A061818, A061819, A061820. %K A061821 nonn,base,easy %O A061821 1,2 %A A061821 _Amarnath Murthy_, May 28 2001 %E A061821 Corrected and extended by Larry Reeves (larryr(AT)acm.org), May 30 2001