A039937 Smallest k for which k, 2k, ... nk all contain the digit 6.

6, 63, 563, 1563, 1632, 3216, 12316, 23266, 66321, 66321, 76923, 76923, 156328, 280692, 566331, 566331, 566331, 2307692, 2307692, 2307692, 2307692, 2307692, 2307692, 2307692, 2307692, 11533664, 23306676, 23306676, 23306676, 23306676

Offset: 1

Author

Erich Friedman

Keywords

• base
• nonn

Comments

a(197) > 10^12. - Giovanni Resta, Apr 27 2017

Examples

			a(2)=63 since 63 and 126 contain a 6.
		

Links

• Giovanni Resta, Table of n, a(n) for n = 1..196

Crossrefs

Cf. A039932, A039933, A039934, A039935, A039936, A039938, A039939, A039940.

Extensions

More terms from Patrick De Geest, Oct 15 1999