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Search: id:A119571
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| A119571 |
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a(n) = 2^(2^n - 1) + 2^(2^(n + 1) - 1) + 1. |
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+0
1
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| 4, 11, 137, 32897, 2147516417, 9223372039002259457, 170141183460469231740910675752738881537, 57896044618658097711785492504343953926805133516280751251460479307672448925697
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Fermat-like sequence of powers of two.
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FORMULA
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a(n) = A058891(n+1)+A058891(n+2)+1. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 22 2007
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MATHEMATICA
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aa = Table[2^(2^n - 1) + 2^(2^(n + 1) - 1) + 1, {n, 0, 10}]
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CROSSREFS
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Sequence in context: A055979 A018242 A006248 this_sequence A089920 A118197 A092658
Adjacent sequences: A119568 A119569 A119570 this_sequence A119572 A119573 A119574
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KEYWORD
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nonn
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), May 31 2006
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Jun 03 2006
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