OFFSET
1,2
EXAMPLE
1 has just one divisor 1, which is <= sqrt(1), therefore 1 is included.
Of the two divisors of 2, [1, 2], only 1 is at most sqrt(2), therefore 2 is included.
Of the three divisors of 4, [1, 2, 4], the first two are <= sqrt(4), and as two is not an odd number, 4 is NOT included in this sequence.
PROG
(PARI) \\ See A369253.
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 24 2024
STATUS
approved