A043520 - OEIS

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A043520

Numbers having four 7's in base 10.

2

7777, 17777, 27777, 37777, 47777, 57777, 67777, 70777, 71777, 72777, 73777, 74777, 75777, 76777, 77077, 77177, 77277, 77377, 77477, 77577, 77677, 77707, 77717, 77727, 77737, 77747, 77757, 77767, 77770, 77771, 77772

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

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

CROSSREFS

Subsequence of A011537.

Sequence in context: A017597 A223361 A222339 * A276144 A234032 A290339

Adjacent sequences: A043517 A043518 A043519 * A043521 A043522 A043523

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved