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