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A043519 Numbers having three 7's in base 10. 2
777, 1777, 2777, 3777, 4777, 5777, 6777, 7077, 7177, 7277, 7377, 7477, 7577, 7677, 7707, 7717, 7727, 7737, 7747, 7757, 7767, 7770, 7771, 7772, 7773, 7774, 7775, 7776, 7778, 7779, 7787, 7797, 7877, 7977, 8777, 9777, 10777 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

Select[Range[11000], DigitCount[#, 10, 7]==3&] (* Harvey P. Dale, Mar 25 2015 *)

CROSSREFS

Subsequence of A011537.

Sequence in context: A177843 A202893 A204300 * A043384 A237162 A252529

Adjacent sequences:  A043516 A043517 A043518 * A043520 A043521 A043522

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 23 05:47 EDT 2021. Contains 347609 sequences. (Running on oeis4.)