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 A061818 #4 Jun 21 2025 14:04:00 %S A061818 0,2,10,12,20,22,100,102,110,112,120,122,200,202,210,212,220,222,1000, %T A061818 1002,1010,1012,1020,1022,1100,1102,1110,1112,1120,1122,1200,1202, %U A061818 1210,1212,1220,1222,2000,2002,2010,2012,2020,2022,2100,2102,2110,2112,2120 %N A061818 Multiples of 2 containing only digits 0,1,2. %e A061818 102 is a term containing digits less than 3. %t A061818 Select[2*Range[0,1100],Max[IntegerDigits[#]]<3&] (* _Harvey P. Dale_, Jun 21 2025 *) %Y A061818 Cf. A061819, etc. Ternary representation of A007494. %K A061818 nonn,base,easy %O A061818 0,2 %A A061818 _Amarnath Murthy_, May 28 2001 %E A061818 More terms from Larry Reeves (larryr(AT)acm.org), May 30 2001