A329762 - OEIS

%I #8 Dec 16 2019 20:08:24

%S 1,5,35,175,7175,179375,17399375,51797939375,3315119917939375,

%T 93137793511399131779375,79375315115111911957537791599375,

%U 55751171777397357155597571713137115337799375

%N 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 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 Cf. A078221, A078223.

%K nonn,base

%O 1,2

%A _Chai Wah Wu_, Dec 04 2019