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 A061810 #4 Feb 15 2017 00:09:55 %S A061810 3,9,15,33,39,51,57,75,93,99,111,117,135,153,159,171,177,195,315,333, %T A061810 339,351,357,375,393,399,513,519,531,537,555,573,579,591,597,711,717, %U A061810 735,753,759,771,777,795,915,933,939,951,957,975,993,999,1113,1119 %N A061810 Multiples of 3 with all odd digits. %H A061810 <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>. %e A061810 135 is a term having all odd digits and 135 = 3*45. %o A061810 (PARI) is(n)=n%3==0 && #setintersect(Set(digits(n)), [0,2,4,6,8])==0 \\ _Charles R Greathouse IV_, Feb 15 2017 %K A061810 nonn,base,easy %O A061810 1,1 %A A061810 _Amarnath Murthy_, May 28 2001 %E A061810 More terms from Larry Reeves (larryr(AT)acm.org), May 30 2001