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

1,1

Comments

a(7) > 64.

Links

Table of n, a(n) for n=1..6.

Example

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.

Sequence in context: A018530 A018554 A293538 * A018620 A018664 A018688

Adjacent sequences: A114876 A114877 A114878 * A114880 A114881 A114882

Keyword

nonn,base,more,hard

Author

Don Reble, Feb 17 2006

Status

approved