A043528 Numbers having four 9's in base 10.

9999, 19999, 29999, 39999, 49999, 59999, 69999, 79999, 89999, 90999, 91999, 92999, 93999, 94999, 95999, 96999, 97999, 98999, 99099, 99199, 99299, 99399, 99499, 99599, 99699, 99799, 99899, 99909, 99919, 99929, 99939

Offset

1,1

Links

Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

Mathematica

Select[Range[100000], DigitCount[#, 10, 9]==4&] (* Harvey P. Dale, Aug 22 2011 *)

Crossrefs

Subsequence of A011539.

Sequence in context: A126978 A188790 A190832 * A089521 A084474 A033422

Adjacent sequences: A043525 A043526 A043527 * A043529 A043530 A043531

Keyword

nonn,base

Author

Clark Kimberling

Status

approved