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A087280
Solutions n of max(m+d(m))=n+2 for m<n; d(m) is the number of divisors of m.
0
5, 8, 10, 12, 24
OFFSET
1,1
COMMENTS
It is not known if there are other terms. There are no more terms < 10^10.
REFERENCES
R. K. Guy, Unsolved Problems in Number Theory, section B8.
LINKS
Paul Erdos, Some Unconventional Problems in Number Theory, Mathematics Magazine, Vol. 52, No. 2, Mar., 1979, pp. 67-70. See Problem 4. p. 68.
EXAMPLE
The largest value of m+d(m) for m < n=8 is 6+d(6)=10 = n+2, so 8 is in the sequence.
CROSSREFS
Sequence in context: A332513 A314381 A325180 * A335495 A355569 A280537
KEYWORD
nonn,more
AUTHOR
Jud McCranie, Aug 28 2003
STATUS
approved