A098874 - OEIS

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A098874

Where A098018(k)=-n.

3, 18, 12, 108, 24, 72, 168, 384, 360, 456, 720, 1824, 1368, 3192, 19260, 6840, 13680, 21000, 80940, 9576, 50616, 39120, 220248, 167808, 264264, 193800, 242820, 181944, 117360, 424080, 456456, 848160, 124488, 2756520, 1618344, 3269112, 2229840 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`k is the first occurrence of -n in A098018.`
	MATHEMATICA	`f[n_] := Plus @@ MoebiusMu[ Drop[ Divisors[n], 1] - 1]; s = Table[0, {100}]; Do[ a = f[n]; If[ !Positive[a] && a > -101 && s[[ -a]] == 0, s[[ -a]] = n], {n, }]; s`
	CROSSREFS	`Cf. A098018, A098869.` `Sequence in context: A120647 A131635 A007475 * A077104 A073815 A195998` `Adjacent sequences: A098871 A098872 A098873 * A098875 A098876 A098877`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet and Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 03 2004`

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Last modified February 14 10:24 EST 2012. Contains 205614 sequences.