A334131 Numbers that can be written as a product of distinct repunits.

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

Offset: 1

Author

Ilya Gutkovskiy, Apr 14 2020

Keywords

• nonn
• base

Examples

			13566531 = 11*111*11111. - _David A. Corneth_, Mar 26 2021
		

Links

• David A. Corneth, Table of n, a(n) for n = 1..10000
• Eric Weisstein's World of Mathematics, Repunit

Crossrefs

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