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A120008 Smallest k such that the concatentation from 1 to k and back to 1 is divisible by 2n-1, or 0 if no such k exists. +0
2
1, 3, 0, 6, 3, 2, 6, 0, 109, 103, 6, 100001, 0, 9, 1006, 17, 6, 0, 3, 6, 5, 103, 0, 1000002, 6, 129, 100012, 0 (list; graph; listen)
OFFSET

1,2

COMMENT

a(29), 2n-1 = 57, is at least 1e8.

CROSSREFS

Cf. A077189.

Sequence in context: A005889 A095712 A085753 this_sequence A162197 A051021 A088162

Adjacent sequences: A120005 A120006 A120007 this_sequence A120009 A120010 A120011

KEYWORD

base,nonn

AUTHOR

Frank Adams-Watters (FrankTAW(AT)Netscape.net), Jun 02 2006

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.


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