A044288 Numbers n such that string 4,1 occurs in the base 9 representation of n but not of n-1.

37, 118, 199, 280, 333, 361, 442, 523, 604, 685, 766, 847, 928, 1009, 1062, 1090, 1171, 1252, 1333, 1414, 1495, 1576, 1657, 1738, 1791, 1819, 1900, 1981, 2062, 2143, 2224, 2305, 2386, 2467, 2520, 2548, 2629, 2710, 2791

Offset

1,1

Links

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

Mathematica

Select[Range[3000], MemberQ[Partition[IntegerDigits[#, 9], 2, 1], {4, 1}] && !MemberQ[Partition[IntegerDigits[#-1, 9], 2, 1], {4, 1}]&] (* Harvey P. Dale, Sep 21 2011 *)

Crossrefs

Sequence in context: A304612 A138638 A193105 * A044669 A048510 A250891

Adjacent sequences: A044285 A044286 A044287 * A044289 A044290 A044291

Keyword

nonn,base

Author

Clark Kimberling

Status

approved