A044791 Numbers n such that string 7,8 occurs in the base 10 representation of n but not of n+1.

78, 178, 278, 378, 478, 578, 678, 778, 789, 878, 978, 1078, 1178, 1278, 1378, 1478, 1578, 1678, 1778, 1789, 1878, 1978, 2078, 2178, 2278, 2378, 2478, 2578, 2678, 2778, 2789, 2878, 2978, 3078, 3178, 3278, 3378, 3478, 3578

Offset

1,1

Links

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

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {7, 8}]>0, 1, 0], {n, 3600}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 02 2020 *)

Crossrefs

Sequence in context: A046428 A119146 A044410 * A232386 A257484 A068130

Adjacent sequences: A044788 A044789 A044790 * A044792 A044793 A044794

Keyword

nonn,base

Author

Clark Kimberling

Status

approved