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A039143 Numbers whose base-10 representation has the same number of 4's and 7's. 0
0, 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 13, 15, 16, 18, 19, 20, 21, 22, 23, 25, 26, 28, 29, 30, 31, 32, 33, 35, 36, 38, 39, 47, 50, 51, 52, 53, 55, 56, 58, 59, 60, 61, 62, 63, 65, 66, 68, 69, 74, 80, 81, 82, 83, 85, 86, 88, 89, 90, 91, 92, 93, 95, 96, 98, 99, 100, 101, 102 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

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

CROSSREFS

Sequence in context: A214329 A049386 A188320 * A039104 A184861 A183572

Adjacent sequences:  A039140 A039141 A039142 * A039144 A039145 A039146

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified January 20 17:42 EST 2022. Contains 350472 sequences. (Running on oeis4.)