A090760 Numbers n which occur exactly three times in A001600.

27, 49, 51, 53, 89, 91, 97, 101, 168, 169, 181, 193, 195, 240, 264

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.

Links

Table of n, a(n) for n=1..15.

Crossrefs

Cf. A001600, A090240.

Sequence in context: A155138 A031325 A090761 * A251143 A109067 A034595

Adjacent sequences: A090757 A090758 A090759 * A090761 A090762 A090763

Keyword

nonn,more

Author

R. K. Guy, Feb 08 2004

Status

approved