A044319 Numbers n such that string 7,5 occurs in the base 9 representation of n but not of n-1.

68, 149, 230, 311, 392, 473, 554, 612, 635, 716, 797, 878, 959, 1040, 1121, 1202, 1283, 1341, 1364, 1445, 1526, 1607, 1688, 1769, 1850, 1931, 2012, 2070, 2093, 2174, 2255, 2336, 2417, 2498, 2579, 2660, 2741, 2799, 2822

Offset

1,1

Links

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

Mathematica

Flatten[Position[Partition[Table[If[MemberQ[Partition[ IntegerDigits[ n, 9], 2, 1], {7, 5}], 1, 0], {n, 3000}], 2, 1], {0, 1}]]+1 (* Harvey P. Dale, Feb 01 2015 *)

Crossrefs

Sequence in context: A044572 A153677 A234876 * A044700 A063341 A118214

Adjacent sequences: A044316 A044317 A044318 * A044320 A044321 A044322

Keyword

nonn,base

Author

Clark Kimberling

Status

approved