A039936 Smallest k for which k, 2k, ... nk all contain the digit 5.

5, 25, 25, 125, 125, 125, 125, 625, 625, 625, 625, 625, 625, 625, 625, 3125, 3125, 3125, 3125, 3125, 3125, 3125, 3125, 3125, 3125, 3125, 3125, 3125, 3125, 3125, 3125, 15625, 15625, 15625, 15625, 15625, 15625, 15625, 15625, 15625, 15625, 15625

Offset: 1

Author

Erich Friedman

Keywords

• base
• nonn

Examples

			a(3)=25 since 25, 50, and 75 all contain a 5.
		

Links

• Giovanni Resta, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A039932, A039933, A039934, A039935, A039937, A039938, A039939, A039940.

Extensions

More terms from Patrick De Geest, Oct 15 1999