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 A061817 #8 Nov 25 2024 09:00:15 %S A061817 9,99,117,135,153,171,315,333,351,513,531,711,999,1179,1197,1359,1377, %T A061817 1395,1539,1557,1575,1593,1719,1737,1755,1773,1791,1917,1935,1953, %U A061817 1971,3159,3177,3195,3339,3357,3375,3393,3519,3537,3555,3573,3591,3717,3735 %N A061817 Multiples of 9 containing only odd digits. %H A061817 <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>. %e A061817 117 = 9*13 is a term. %t A061817 Select[9Range[500],And@@OddQ[IntegerDigits[#]]&] (* _Harvey P. Dale_, May 30 2013 *) %o A061817 (PARI) is(n)=n%9==0 && #setintersect(Set(digits(n)), [0,2,4,6,8])==0 \\ _Charles R Greathouse IV_, Feb 15 2017 %Y A061817 Subsequence of A014261. %Y A061817 Cf. A061810, A014263, A061814, A061815, A061816. %K A061817 nonn,base,easy %O A061817 1,1 %A A061817 _Amarnath Murthy_, May 28 2001 %E A061817 Corrected and extended by Larry Reeves (larryr(AT)acm.org), May 30 2001