OFFSET
0,2
COMMENTS
Square of product of first n primorials = A006939(n)^2.
Smallest number with n distinct even exponents in its prime factorization.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..27
FORMULA
a(n) = Product_{k=1..n} A002110(k)^2 = Product_{k=1..n} prime(k)^(2(n-k+1)).
MATHEMATICA
Rest[FoldList[Times, 1, FoldList[Times, 1, Prime[Range[9]]^2]]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Jonathan Sondow, Mar 22 2014
STATUS
approved