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Search: id:A139297
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| A139297 |
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(2^(2p - 1)/2)-1, where p is a Mersenne prime A000668(n). |
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+0
12
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OFFSET
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1,1
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FORMULA
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a(n) = (2^(2*A000668(n)-1)/2)-1.
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CROSSREFS
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Cf. A000668, A139286, A139294, A139295, A139296, A139298, A139299, A139300, A139301, A139302, A139303, A139304, A139305, A139306.
Sequence in context: A013720 A145189 A153832 this_sequence A070907 A079919 A027513
Adjacent sequences: A139294 A139295 A139296 this_sequence A139298 A139299 A139300
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KEYWORD
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bref,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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