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A319542
Record values in A039932.
1
1, 51, 531, 2571, 15703, 90271, 102053, 530102, 4550102, 4570102, 4580102, 22900501, 134003006, 1002003005, 5001002003, 5003001002, 30005001002, 30005002001, 200030005001, 1000200030005, 5000100020003, 5000300010002
OFFSET
1,2
COMMENTS
The positive integer n belongs to the sequence iff there exists a positive integer k so that each of the first k multiples of n contains the decimal digit 1, but no smaller n has this property for the same value of k.
EXAMPLE
51 is a term because the first three multiples of 51 (51, 102, 153) all contain the digit 1, and 51 is the least positive integer with this property.
CROSSREFS
Cf. A319548, A039932, A317173. Subset of A011531.
Sequence in context: A355418 A142994 A251932 * A173804 A166820 A269438
KEYWORD
nonn,base
AUTHOR
David Radcliffe, Sep 22 2018
STATUS
approved