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Search: id:A097743
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| A097743 |
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Numbers of the form 3*2^(p - 1) - 1 where p is prime. |
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+0
4
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| 5, 11, 47, 191, 3071, 12287, 196607, 786431, 12582911, 805306367, 3221225471, 206158430207, 3298534883327, 13194139533311, 211106232532991, 13510798882111487, 864691128455135231, 3458764513820540927
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OFFSET
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1,1
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EXAMPLE
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Two examples: p=2, 2^(2-1) + (2^2 - 1) = 5 and p=3, 2^(3-1) + (2^3 - 1) = 11.
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MATHEMATICA
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Table[3*2^(Prime[n] - 1) - 1, {n, 18}] (from Robert G. Wilson v Sep 24 2004)
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CROSSREFS
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Cf. A000396, A098102, A055010.
Sequence in context: A149511 A149512 A149513 this_sequence A041213 A142238 A149514
Adjacent sequences: A097740 A097741 A097742 this_sequence A097744 A097745 A097746
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KEYWORD
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nonn
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AUTHOR
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Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Sep 21 2004
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EXTENSIONS
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Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 24 2004
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