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A044726 Numbers n such that string 1,3 occurs in the base 10 representation of n but not of n+1. 0
13, 113, 139, 213, 313, 413, 513, 613, 713, 813, 913, 1013, 1113, 1139, 1213, 1399, 1413, 1513, 1613, 1713, 1813, 1913, 2013, 2113, 2139, 2213, 2313, 2413, 2513, 2613, 2713, 2813, 2913, 3013, 3113, 3139, 3213, 3313, 3413 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..39.

MATHEMATICA

Flatten[Position[Partition[Table[If[MemberQ[Partition[IntegerDigits[n], 2, 1], {1, 3}], 1, 0], {n, 4000}], 2, 1], _?(#=={1, 0}&)]] (* Harvey P. Dale, Dec 24 2013 *)

CROSSREFS

Sequence in context: A293873 A044345 A166573 * A303038 A141937 A320464

Adjacent sequences:  A044723 A044724 A044725 * A044727 A044728 A044729

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 22 19:36 EDT 2021. Contains 347608 sequences. (Running on oeis4.)