A044593 - OEIS

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A044593

Numbers n such that string 3,1 occurs in the base 8 representation of n but not of n+1.

25, 89, 153, 207, 217, 281, 345, 409, 473, 537, 601, 665, 719, 729, 793, 857, 921, 985, 1049, 1113, 1177, 1231, 1241, 1305, 1369, 1433, 1497, 1561, 1663, 1689, 1743, 1753, 1817, 1881, 1945, 2009, 2073, 2137, 2201, 2255, 2265

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OFFSET

1,1

LINKS

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

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 8], {3, 1}]>0, 1, 0], {n, 2500}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 05 2020 *)

CROSSREFS

Sequence in context: A251195 A087240 A044212 * A262492 A280297 A090659

Adjacent sequences: A044590 A044591 A044592 * A044594 A044595 A044596

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved