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Search: id:A101329
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| A101329 |
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2^(2^(2^x)+1)-1 = M(F(x)) == Mersenne(Fermat(x)) |
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+0
1
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| 7, 31, 131071, 231584178474632390847141970017375815706539969331281128078915168015826259279871
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OFFSET
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0,1
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COMMENT
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Mersenne-Fermat numbers.
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FORMULA
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a(n) = A070969(2^n)-2. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 22 2007
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EXAMPLE
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M(F(0))=7
M(F(1))=31
M(F(2))=131071
M(F(3))=31231584178474632390847141970017375815706539969331281128078915168015826259279871
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PROGRAM
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(PARI) for(x=0, 3, print(2^(2^(2^x)+1)-1))
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CROSSREFS
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Sequence in context: A134709 A139314 A163083 this_sequence A164819 A067811 A044084
Adjacent sequences: A101326 A101327 A101328 this_sequence A101330 A101331 A101332
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KEYWORD
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nonn
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AUTHOR
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Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Dec 24 2004
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