A362099 Numbers k such that 7^k starts with k.

3, 5560, 14350, 76972, 239123, 2067170, 19320438, 748459491, 1273027965, 6925699528, 7758433284, 8408679517, 32002385444, 556647183084, 973172636259, 1132856618148, 61106658474182, 86958225528107, 672668768873501, 10307856194310255

Offset

1,1

Links

Table of n, a(n) for n=1..20.

Crossrefs

b^k starts with k: A131493 (b=pi), A131494 (b=e), A100129 (b=2), A362096 (b=3), A320930 (b=4), A362097 (b=5), A362098 (b=6), A362099 (b=7), A362100 (b=8), A362101 (b=9).

Cf. A000420, A033147, A131495.

Sequence in context: A307210 A171362 A249511 * A248506 A368622 A034317

Adjacent sequences: A362096 A362097 A362098 * A362100 A362101 A362102

Keyword

nonn,base

Author

N. J. A. Sloane, Apr 10 2023, based on an email from Keith F. Lynch

Extensions

a(13)-a(20) from Max Alekseyev, Nov 09 2025

Status

approved