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A098640
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2^p + 1 where p is prime.
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3
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5, 9, 33, 129, 2049, 8193, 131073, 524289, 8388609, 536870913, 2147483649, 137438953473, 2199023255553, 8796093022209, 140737488355329, 9007199254740993, 576460752303423489, 2305843009213693953
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| If p=2, 2^2+1 = 5
If p=7, 2^7+1 = 129
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MATHEMATICA
| Table[2^Prime[n] + 1, {n, 18}] (from Robert G. Wilson v Nov 01 2004)
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CROSSREFS
| Sequence in context: A034435 A116390 A028351 * A083832 A070969 A200376
Adjacent sequences: A098637 A098638 A098639 * A098641 A098642 A098643
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KEYWORD
| nonn,easy
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Oct 27 2004
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 01 2004
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