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A334131 Numbers that can be written as a product of distinct repunits. 3
0, 1, 11, 111, 1111, 1221, 11111, 12221, 111111, 122221, 123321, 1111111, 1222221, 1233321, 1356531, 11111111, 12222221, 12333321, 12344321, 13566531, 111111111, 122222221, 123333321, 123444321, 135666531, 135787531, 1111111111, 1222222221 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

David A. Corneth, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Repunit

EXAMPLE

13566531 = 11*111*11111. - David A. Corneth, Mar 26 2021

CROSSREFS

Cf. A000042, A002275, A015009, A077488, A083278, A308365.

Sequence in context: A336325 A098595 A273978 * A077488 A039988 A182452

Adjacent sequences:  A334128 A334129 A334130 * A334132 A334133 A334134

KEYWORD

nonn,base

AUTHOR

Ilya Gutkovskiy, Apr 14 2020

STATUS

approved

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Last modified June 14 10:04 EDT 2021. Contains 345025 sequences. (Running on oeis4.)