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A175138 a(n) = product_{i=1..n-1} a(i), with a(1) = 3 and a(2) = 5. 2
3, 5, 15, 225, 50625, 2562890625, 6568408355712890625, 43143988327398919500410556793212890625, 1861403728794734215467410604755702820123364205073812627233564853668212890625 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Except for first three terms, a(n) = (a(n-1))^2 .

LINKS

Table of n, a(n) for n=1..9.

FORMULA

a(n) = 15^(2^(n-3)), n > 2.

MATHEMATICA

Join[{3, 5}, NestList[#^2&, 15, 7]] (* Harvey P. Dale, Feb 08 2013 *)

CROSSREFS

Sequence in context: A214534 A270548 A292339 * A248795 A215444 A006593

Adjacent sequences:  A175135 A175136 A175137 * A175139 A175140 A175141

KEYWORD

nonn

AUTHOR

Giovanni Teofilatto, Feb 23 2010

EXTENSIONS

Edited by Jaroslav Krizek and R. J. Mathar, Mar 04 2010

STATUS

approved

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Last modified October 15 17:55 EDT 2018. Contains 316237 sequences. (Running on oeis4.)