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.

1, 5, 35, 175, 7175, 179375, 17399375, 51797939375, 3315119917939375, 93137793511399131779375, 79375315115111911957537791599375, 55751171777397357155597571713137115337799375

Offset

1,2

Comments

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.

Links

Table of n, a(n) for n=1..12.

Crossrefs

Cf. A078221, A078223.

Sequence in context: A048515 A219973 A100739 * A359520 A043014 A165755

Adjacent sequences: A329759 A329760 A329761 * A329763 A329764 A329765

Keyword

nonn,base

Author

Chai Wah Wu, Dec 04 2019

Status

approved