A044657 Numbers n such that string 2,7 occurs in the base 9 representation of n but not of n+1.

25, 106, 187, 233, 268, 349, 430, 511, 592, 673, 754, 835, 916, 962, 997, 1078, 1159, 1240, 1321, 1402, 1483, 1564, 1645, 1691, 1726, 1807, 1888, 1969, 2105, 2131, 2212, 2293, 2374, 2420, 2455, 2536, 2617, 2698, 2779, 2860

Offset

1,1

Links

Table of n, a(n) for n=1..40.

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 9], {2, 7}]>0, 1, 0], {n, 3000}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 31 2019 *)

Crossrefs

Sequence in context: A379868 A158551 A044276 * A160437 A050589 A340123

Adjacent sequences: A044654 A044655 A044656 * A044658 A044659 A044660

Keyword

nonn,base

Author

Clark Kimberling

Status

approved