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 A329762 #8 Dec 16 2019 20:08:24 %S A329762 1,5,35,175,7175,179375,17399375,51797939375,3315119917939375, %T A329762 93137793511399131779375,79375315115111911957537791599375, %U A329762 55751171777397357155597571713137115337799375 %N A329762 a(1) = 1; thereafter a(n+1) > a(n) is the smallest multiple of a(n) using only odd digits but not divisible by 3. %C A329762 Equivalently, the sequence is defined as a(1) = 1, a(2) = 5, and for n > 1, a(n+1) > a(n) is the smallest multiple of a(n) using only odd digits. All terms besides a(1) are divisible by 5. %Y A329762 Cf. A078221, A078223. %K A329762 nonn,base %O A329762 1,2 %A A329762 _Chai Wah Wu_, Dec 04 2019