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A114879 Numbers n coprime to 3 such that there exists an (n-1)-digit ternary number wherein each substring is indivisible by n. 0
2, 4, 5, 10, 20, 37 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(7) > 64.
LINKS
EXAMPLE
20 is there because each substring of 1121212211122121211 (base 3) is indivisible by 20.
CROSSREFS
Sequence in context: A018530 A018554 A293538 * A018620 A018664 A018688
KEYWORD
nonn,base,more,hard
AUTHOR
Don Reble, Feb 17 2006
STATUS
approved

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)