OFFSET
1,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..17
FORMULA
a(n)=(n!)^(A034444(n!)/2)
EXAMPLE
n = 6 has 8 unitary divisors:{16,45,9,80,5,144,1,720}, a(6) = 720^4 = 268738560000
MATHEMATICA
a[n_] := (n!)^(2^(PrimePi[n]-1)); Array[a, 10] (* Amiram Eldar, Jul 16 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Sep 13 2001
STATUS
approved