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A258254
Denominators of partial sums of 1/A258252(i), 1 <= i <= n.
2
1, 2, 3, 1, 4, 3, 5, 2, 7, 5, 5, 6, 7, 1, 8, 6, 9, 3, 11, 8, 5, 12, 7, 9, 11, 2, 13, 11, 11, 14, 17, 3, 7, 4, 5, 11, 6, 13, 7, 8, 9, 10, 11, 12, 13, 1, 16, 12, 9, 15, 7, 20, 13, 19, 6, 17, 11, 16, 5, 14, 9, 13, 4, 11, 7, 17, 10, 13, 3, 23, 20, 17, 17, 12, 19, 7, 16, 9, 20
OFFSET
1,2
COMMENTS
Presumably, every natural number appears infinitely many times.
A258252(n) is a divisor of lcm(a(n-1), a(n)). The first case when it is a proper divisor (rather than that number itself) occurs at n=169.
LINKS
CROSSREFS
Cf. A258252, A002805 (analog for harmonic series).
Sequence in context: A317024 A354803 A140757 * A100035 A201927 A238442
KEYWORD
nonn
AUTHOR
Ivan Neretin, May 24 2015
STATUS
approved