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A031297 a(n) = least k such that base 10 representation of n begins at s(k), where s=A007376. 5
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 1, 16, 18, 20, 22, 24, 26, 28, 30, 15, 34, 2, 38, 40, 42, 44, 46, 48, 50, 17, 37, 56, 3, 60, 62, 64, 66, 68, 70, 19, 39, 59, 78, 4, 82, 84, 86, 88, 90, 21, 41, 61, 81, 100, 5, 104, 106, 108, 110, 23, 43, 63, 83 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A229186 is the same sequence including the a(0) term.

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 1..10000

MAPLE

with(StringTools): s:="": for n from 1 to 70 do s:=cat(s, convert(n, string)): od: seq(Search(convert(n, string), s), n=1..70); # Nathaniel Johnston, May 26 2011

CROSSREFS

Cf. A229186 (same sequence but including the a(0) term).

Cf. A165449.

Sequence in context: A077741 A132575 A239235 * A239086 A306866 A187769

Adjacent sequences:  A031294 A031295 A031296 * A031298 A031299 A031300

KEYWORD

nonn,easy,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 5 23:36 EDT 2020. Contains 335475 sequences. (Running on oeis4.)