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Search: id:A139288
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| A139288 |
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2^(2p - 1)/2, where p is prime. |
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+0
9
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| 4, 16, 256, 4096, 1048576, 16777216, 4294967296, 68719476736
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n)=A139286(n)/2.
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CROSSREFS
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Cf. A139286, A139287, A139289, A139290, A139291, A139292, A139293, A139294, A139306.
Sequence in context: A088027 A113905 A099202 this_sequence A152921 A152153 A144988
Adjacent sequences: A139285 A139286 A139287 this_sequence A139289 A139290 A139291
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KEYWORD
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more,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Apr 13 2008
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