A043508 Numbers having four 4's in base 10.

4444, 14444, 24444, 34444, 40444, 41444, 42444, 43444, 44044, 44144, 44244, 44344, 44404, 44414, 44424, 44434, 44440, 44441, 44442, 44443, 44445, 44446, 44447, 44448, 44449, 44454, 44464, 44474, 44484, 44494, 44544

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Links

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

Crossrefs

Subsequence of A011534.

Programs

Mathematica

Select[Range[50000], DigitCount[#, 10, 4]==4&] (* Vincenzo Librandi, Jul 01 2015 *)