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Search: id:A139296
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| 16, 4096, 1152921504606846976, 7237005577332262213973186563042994240829374041602535252466099000494570602496
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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a(5) has 4931 digits and is too large to include. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 30 2008
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FORMULA
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a(n) = 2^(2*A000668(n)-1)/2.
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CROSSREFS
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Cf. A000668, A139286, A139294, A139295, A139297, A139298, A139299, A139300, A139301, A139302, A139303, A139304, A139305, A139306.
Sequence in context: A053859 A053863 A053765 this_sequence A090045 A123280 A159403
Adjacent sequences: A139293 A139294 A139295 this_sequence A139297 A139298 A139299
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KEYWORD
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bref,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Apr 13 2008
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EXTENSIONS
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One more term from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 30 2008
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