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Search: id:A098640
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| A098640 |
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2^p + 1 where p is prime. |
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+0
2
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| 5, 9, 33, 129, 2049, 8193, 131073, 524289, 8388609, 536870913, 2147483649, 137438953473, 2199023255553, 8796093022209, 140737488355329, 9007199254740993, 576460752303423489, 2305843009213693953
(list; graph; listen)
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OFFSET
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1,1
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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}] (from Robert G. Wilson v Nov 01 2004)
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CROSSREFS
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Sequence in context: A034435 A116390 A028351 this_sequence A083832 A070969 A098477
Adjacent sequences: A098637 A098638 A098639 this_sequence 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 (PachaNambi(AT)yahoo.com), Oct 27 2004
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 01 2004
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