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A098640
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2^p + 1 where p is prime.
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9
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5, 9, 33, 129, 2049, 8193, 131073, 524289, 8388609, 536870913, 2147483649, 137438953473, 2199023255553, 8796093022209, 140737488355329, 9007199254740993, 576460752303423489, 2305843009213693953
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OFFSET
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1,1
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..200
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EXAMPLE
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If p=2, 2^2+1 = 5.
If p=7, 2^7+1 = 129.
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MATHEMATICA
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Table[2^Prime[n] + 1, {n, 18}] (* Robert G. Wilson v, Nov 01 2004 *)
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PROG
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(MAGMA) [2^p+1: p in PrimesUpTo(100)]; // Vincenzo Librandi, Apr 29 2014
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CROSSREFS
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Sequence in context: A116390 A028351 A211952 * A239546 A083832 A070969
Adjacent sequences: A098637 A098638 A098639 * A098641 A098642 A098643
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KEYWORD
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nonn,easy
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AUTHOR
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Parthasarathy Nambi, Oct 27 2004
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EXTENSIONS
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More terms from Robert G. Wilson v, Nov 01 2004
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STATUS
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approved
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