A044144 Numbers k such that string 0,6 occurs in the base 7 representation of k but not of k-1.

55, 104, 153, 202, 251, 300, 349, 385, 398, 447, 496, 545, 594, 643, 692, 728, 741, 790, 839, 888, 937, 986, 1035, 1071, 1084, 1133, 1182, 1231, 1280, 1329, 1378, 1414, 1427, 1476, 1525, 1574, 1623, 1672, 1721, 1757, 1770, 1819, 1868, 1917, 1966, 2015, 2064, 2100, 2113

Offset

1,1

Links

Paolo Xausa, Table of n, a(n) for n = 1..10000

Mathematica

A044144Q[k_] := StringContainsQ[IntegerString[k, 7], "06"] && StringFreeQ[IntegerString[k - 1, 7], "06"];
Select[Range[5000], A044144Q] (* Paolo Xausa, Sep 10 2025 *)

Crossrefs

Cf. A007093.

Sequence in context: A115377 A381917 A146145 * A044525 A323070 A118151

Adjacent sequences: A044141 A044142 A044143 * A044145 A044146 A044147

Keyword

nonn,base

Author

Clark Kimberling

Extensions

More terms from Paolo Xausa, Sep 10 2025

Status

approved