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A090758 Numbers n which occur exactly twice in A001600. +0
2
5, 13, 15, 17, 19, 24, 29, 37, 44, 45, 46, 47, 61, 73, 75, 85, 86, 87, 99, 105, 107, 144, 145, 149, 171, 173, 186, 187, 197, 203, 205, 224, 245, 252, 270, 272, 276, 279, 282, 284 (list; graph; listen)
OFFSET

1,1

REFERENCES

T. Goto and S. Shibata, All numbers whose positive divisors have integral harmonic mean up to 300, Math. Comput. 73 (2004), 475-491.

CROSSREFS

Cf. A001600, A090240.

Sequence in context: A134202 A020996 A090759 this_sequence A067696 A050598 A088908

Adjacent sequences: A090755 A090756 A090757 this_sequence A090759 A090760 A090761

KEYWORD

nonn,more

AUTHOR

R. K. Guy (rkg(AT)cpsc.ucalgary.ca), Feb 08 2004

EXTENSIONS

R. K. Guy (rkg(AT)cpsc.ucalgary.ca), Feb 08 2004

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Last modified December 3 16:57 EST 2008. Contains 151279 sequences.


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