OFFSET
1,2
COMMENTS
a(n) <= 6^(n-1); 36^(n-1) has (2n-1)^2 divisors for all n.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..68
FORMULA
EXAMPLE
For n = 8, a(8) = 1260 = 2*2*3*3*5*7 and d(1260^2) = d(2*2*2*2*3*3*3*3*5*5*7*7) = 225 = (2*8-1)^2.
For n = 14, a(14) = 18480 and d((2*2*2*2*2*2*2*2*3*5*7*11)^2) = 729 = (2*14-1)^2.
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Jun 19 2001
EXTENSIONS
More terms from David Wasserman, Jun 24 2002
Edited by Charlie Neder, Jun 03 2019
a(26)-a(27) from Amiram Eldar, Dec 03 2023
STATUS
approved