A031493 Numbers whose base-9 representation has one more 0 than 8's.

9, 18, 27, 36, 45, 54, 63, 82, 83, 84, 85, 86, 87, 88, 90, 99, 108, 117, 126, 135, 144, 163, 164, 165, 166, 167, 168, 169, 171, 180, 189, 198, 207, 216, 225, 244, 245, 246, 247, 248, 249, 250, 252, 261, 270, 279, 288, 297, 306, 325

Offset

1,1

Links

Table of n, a(n) for n=1..50.

Mathematica

Select[Range@400, (s=#; Differences[Count[IntegerDigits[s, 9], #]&/@{0, 8}]=={-1})&] (* Giorgos Kalogeropoulos, Jul 04 2021 *)

Crossrefs

Cf. A007095.

Sequence in context: A178896 A217373 A033021 * A020336 A044834 A033006

Adjacent sequences: A031490 A031491 A031492 * A031494 A031495 A031496

Keyword

nonn,base

Author

Clark Kimberling

Status

approved