A043520 Numbers having four 7's in base 10.

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

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