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A091283 Exponent of 2 in -1+prime[n]^s, if s is an exponent of the form s=8k-4. 2
0, 4, 4, 5, 4, 4, 6, 4, 5, 4, 7, 4, 5, 4, 6, 4, 4, 4, 4, 5, 5, 6, 4, 5, 7, 4, 5, 4, 4, 6, 9, 4, 5, 4, 4, 5, 4, 4, 5, 4, 4, 4, 8, 8, 4, 5, 4, 7, 4, 4, 5, 6, 6, 4, 10, 5, 4, 6, 4, 5, 4, 4, 4, 5, 5, 4, 4, 6, 4, 4, 7, 5, 6, 4, 4, 9, 4, 4, 6, 5, 4, 4, 6, 6, 5, 4, 8, 5, 4, 6, 4, 7, 5, 4, 4, 5, 4, 5, 4, 4, 4, 4, 4, 5, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
MATHEMATICA
Table[{8*k-4, Table[Part[Flatten[FactorInteger [ -1+Prime[n]^(8*k-4)]], 2], {n, 2, m}]}, {k, 1, 2}]
CROSSREFS
Sequence in context: A283268 A016709 A023403 * A161758 A046566 A046593
KEYWORD
nonn
AUTHOR
Labos Elemer, Jan 22 2004
STATUS
approved

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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)