OFFSET
1,1
COMMENTS
See A355061 for further details.
LINKS
Scott R. Shannon, Image of the first 250000 terms.
PROG
(Python)
from sympy import primefactors
from itertools import count, islice
def agen(): # generator of terms
an1, an, f1, f, pset = 2, 6, {2}, {2, 3}, {2, 12}
yield from [2, 12]
for n in count(4):
an2, an1, an, f2, f1 = an1, an, 6, f1, f
f = set(primefactors(an))
while an*an1 in pset or f1&f == set() or f2&f != set() or f <= f1:
an += 1; f = set(primefactors(an))
pset.add(an*an1); yield an*an1
print(list(islice(agen(), 58))) # Michael S. Branicky, Jun 20 2022
CROSSREFS
KEYWORD
nonn
AUTHOR
Scott R. Shannon, Jun 20 2022
STATUS
approved