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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 (list; graph; refs; listen; history; text; internal format)
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.

LINKS

Table of n, a(n) for n=1..22.

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: A128511 A142994 A251932 * A173804 A166820 A269438

Adjacent sequences:  A319539 A319540 A319541 * A319543 A319544 A319545

KEYWORD

nonn,base

AUTHOR

David Radcliffe, Sep 22 2018

STATUS

approved

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Last modified November 15 14:06 EST 2019. Contains 329149 sequences. (Running on oeis4.)