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A175138
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a(n) = product_{i=1..n-1} a(i), with a(1) = 3 and a(2) = 5.
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2
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3, 5, 15, 225, 50625, 2562890625, 6568408355712890625, 43143988327398919500410556793212890625, 1861403728794734215467410604755702820123364205073812627233564853668212890625
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OFFSET
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1,1
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COMMENTS
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Except for first three terms, a(n) = (a(n-1))^2 .
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LINKS
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Table of n, a(n) for n=1..9.
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FORMULA
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a(n) = 15^(2^(n-3)), n > 2.
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MATHEMATICA
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Join[{3, 5}, NestList[#^2&, 15, 7]] (* Harvey P. Dale, Feb 08 2013 *)
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CROSSREFS
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Sequence in context: A214534 A270548 A292339 * A248795 A215444 A330055
Adjacent sequences: A175135 A175136 A175137 * A175139 A175140 A175141
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KEYWORD
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nonn
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AUTHOR
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Giovanni Teofilatto, Feb 23 2010
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EXTENSIONS
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Edited by Jaroslav Krizek and R. J. Mathar, Mar 04 2010
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STATUS
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approved
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