id:A106317 - OEIS Search Results

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Numbers n such that the remainder of the harmonic residue of n when divided by n is n-1.

+0
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 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`It appears that n is in the sequence iff n is prime or n is in {1, 21} (Verified to 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`
	CROSSREFS	`Cf. A106315, A106316.` `Adjacent sequences: A106314 A106315 A106316 this_sequence A106318 A106319 A106320` `Sequence in context: A100546 A117094 A117289 this_sequence A095405 A113581 A124180`
	KEYWORD	`nonn`
	AUTHOR	`George J. Schaeffer (gschaeff(AT)andrew.cmu.edu), Apr 29 2005`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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