A044754 - OEIS

A044754

Numbers n such that string 4,1 occurs in the base 10 representation of n but not of n+1.

41, 141, 241, 341, 419, 441, 541, 641, 741, 841, 941, 1041, 1141, 1241, 1341, 1419, 1441, 1541, 1641, 1741, 1841, 1941, 2041, 2141, 2241, 2341, 2419, 2441, 2541, 2641, 2741, 2841, 2941, 3041, 3141, 3241, 3341, 3419, 3441

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OFFSET

1,1

LINKS

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

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {4, 1}]>0, 1, 0], {n, 3500}], {1, 0}][[All, 1]] (* Harvey P. Dale, May 10 2019 *)

CROSSREFS

Sequence in context: A297398 A142449 A044373 * A254898 A217087 A303910

Adjacent sequences: A044751 A044752 A044753 * A044755 A044756 A044757

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved