cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A092102 Non-harmonic primes: the odd primes not in A092101.

Original entry on oeis.org

3, 7, 11, 19, 29, 31, 37, 43, 47, 53, 59, 61, 71, 83, 89, 97, 101, 103, 109, 127, 131, 137, 151, 163, 167, 173, 181, 197, 199, 211, 227, 229, 233, 257, 269, 271, 283, 313, 347, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 433, 439, 457, 463, 509, 521, 523
Offset: 1

Views

Author

T. D. Noe, Feb 20 2004

Keywords

Comments

For p = prime(n), Boyd defines Jp to be the set of numbers k such that p divides A001008(k), the numerator of the harmonic number H(k). For harmonic primes, Jp contains only the three numbers p-1, (p-1)p and (p-1)(p+1).
Boyd's paper omits 509.

References

  • A. Eswarathasan and E. Levine, p-integral harmonic sums, Discrete Math. 91 (1991), 249-257.

Crossrefs

Cf. A092101 (harmonic primes), A092103 (size of Jp).