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

Author

R. K. Guy, Feb 08 2004

Keywords

• nonn
• more

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.