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A044007 Numbers n such that 1 and 4 occur juxtaposed in the base 10 representation of n but not of n+1. 0
14, 41, 114, 149, 214, 241, 314, 341, 419, 441, 514, 541, 614, 641, 714, 741, 814, 841, 914, 941, 1014, 1041, 1114, 1149, 1214, 1241, 1314, 1341, 1499, 1514, 1541, 1614, 1641, 1714, 1741, 1814, 1841, 1914, 1941, 2014, 2041 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..41.

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {1, 4}]> 0 || SequenceCount[IntegerDigits[n], {4, 1}]>0, 1, 0], {n, 2100}], {1, 0}] [[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 01 2019 *)

CROSSREFS

Sequence in context: A056034 A039404 A043227 * A199710 A214521 A064512

Adjacent sequences:  A044004 A044005 A044006 * A044008 A044009 A044010

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 21 22:02 EDT 2019. Contains 325210 sequences. (Running on oeis4.)