OFFSET
1,2
COMMENTS
As all terms in A217584 are squares so these list the square roots.
Also: Numbers k such that k^2 is the least positive integer having its prime signature and d(k^4)/d(k^2) is an integer.
LINKS
David A. Corneth, Table of n, a(n) for n = 1..3393
EXAMPLE
12 is in the sequence as 12^2 = 144 and 144^2 has 45 divisors and 144 has 15 divisors and 45/15 = 3 is integer and 12 is in A025487 and so is 144.
CROSSREFS
KEYWORD
nonn
AUTHOR
David A. Corneth, May 30 2020
STATUS
approved