A114879 Numbers n coprime to 3 such that there exists an (n-1)-digit ternary number wherein each substring is indivisible by n.

2, 4, 5, 10, 20, 37

Offset: 1

Author

Don Reble, Feb 17 2006

Keywords

• nonn
• base
• more
• hard

Comments

a(7) > 64.

Examples

			20 is there because each substring of 1121212211122121211 (base 3) is indivisible by 20.
		

Crossrefs

Cf. A114880, A114942, A114943, A114944, A114908, A114909, A114910, A114911, A114922.