A039122 Numbers whose base-10 representation has the same number of 1's and 4's.

0, 2, 3, 5, 6, 7, 8, 9, 14, 20, 22, 23, 25, 26, 27, 28, 29, 30, 32, 33, 35, 36, 37, 38, 39, 41, 50, 52, 53, 55, 56, 57, 58, 59, 60, 62, 63, 65, 66, 67, 68, 69, 70, 72, 73, 75, 76, 77, 78, 79, 80, 82, 83, 85, 86, 87, 88, 89, 90, 92, 93, 95, 96, 97, 98, 99, 104, 124, 134

Offset

1,2

Links

Table of n, a(n) for n=1..69.

Mathematica

Select[Range[0, 150], DigitCount[#, 10, 1]==DigitCount[#, 10, 4]&] (* Harvey P. Dale, Nov 14 2024 *)

Crossrefs

Sequence in context: A117578 A244217 A351224 * A355547 A031975 A028729

Adjacent sequences: A039119 A039120 A039121 * A039123 A039124 A039125

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved