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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
OFFSET
1,1
COMMENTS
Except for first three terms, a(n) = (a(n-1))^2 .
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: A270548 A292339 A374463 * A248795 A215444 A325257
KEYWORD
nonn
AUTHOR
Giovanni Teofilatto, Feb 23 2010
EXTENSIONS
Edited by Jaroslav Krizek and R. J. Mathar, Mar 04 2010
STATUS
approved