OFFSET
1,1
COMMENTS
See A066272 for definition of anti-divisor.
If it exists, a(5) > 3*2^(1000). See A092679. - J.W.L. (Jan) Eerland, Nov 13 2022
FORMULA
a(n) = 3*2^A092679(n).
PROG
(Python)
from itertools import count, islice
from sympy.ntheory.factor_ import antidivisor_count
def A092680_gen(): return filter(lambda n: antidivisor_count(n)==1, (3*2**k for k in count(0)))
KEYWORD
nonn,hard,more
AUTHOR
Lior Manor, Mar 03 2004
STATUS
approved