

A106317


Numbers n such that the remainder of the harmonic residue of n when divided by n is n1.


3



1, 2, 3, 5, 7, 11, 13, 17, 19, 21, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199
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OFFSET

1,2


LINKS

Table of n, a(n) for n=1..48.


FORMULA

It appears that n is in the sequence iff n is prime or n is in {1, 21, 822857} (Verified to 3.1*10^6). It is true that if n is the product of two distinct primes, then n=21.  George J. Schaeffer (gschaeff(AT)andrew.cmu.edu), Apr 30 2005, R. J. Mathar, Jan 25 2017


CROSSREFS

Cf. A106315, A106316.
Sequence in context: A117289 A328513 A318719 * A246281 A152242 A166504
Adjacent sequences: A106314 A106315 A106316 * A106318 A106319 A106320


KEYWORD

nonn


AUTHOR

George J. Schaeffer (gschaeff(AT)andrew.cmu.edu), Apr 29 2005


STATUS

approved



