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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
OFFSET
1,3
CROSSREFS
Sequence in context: A214329 A049386 A188320 * A039104 A184861 A183572
KEYWORD
nonn,base,easy
STATUS
approved