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A179077 a(n)=((2^p - 2)/p) mod p where p is n-th prime 1
1, 2, 1, 4, 10, 6, 9, 6, 11, 2, 12, 2, 5, 7, 41, 19, 16, 11, 20, 4, 39, 38, 13, 12, 17, 83, 15, 26, 25, 53, 36, 34, 106, 60, 43, 112, 7, 134, 94, 6, 100, 115, 100, 15, 153, 71, 7, 155, 175, 136, 14, 52, 43, 243, 193, 256, 251, 218, 140, 148, 116, 156, 281, 39, 240, 33, 278 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = 0 where n=183 (p=1093) and n=490 (p=3511).

LINKS

Table of n, a(n) for n=1..67.

MATHEMATICA

aa = {}; Do[AppendTo[aa, Mod[(2^Prime[n] - 2)/Prime[n], Prime[n]]], {n, 1, 100}]; aa (*Artur Jasinski*)

CROSSREFS

Sequence in context: A220993 A219002 A156919 * A038195 A212770 A205855

Adjacent sequences:  A179074 A179075 A179076 * A179078 A179079 A179080

KEYWORD

nonn

AUTHOR

Artur Jasinski, Jun 28 2010

STATUS

approved

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Last modified February 23 17:41 EST 2018. Contains 299584 sequences. (Running on oeis4.)