id:A016097 - OEIS Search Results

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Least k such that k - phi(k) = n or 0 if impossible.

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1, 4, 9, 6, 25, 10, 15, 12, 21, 0, 35, 18, 33, 26, 39, 24, 65, 34, 51, 38, 45, 30, 95, 36, 69, 0, 63, 52, 161, 42, 87, 48, 93, 0, 75, 54, 217, 74, 99, 76, 185, 82, 123, 60, 117, 66, 215, 72, 141, 0, 235, 0, 329, 78, 159, 98, 105, 0, 371, 84, 177, 122, 135, 96 (list; graph; listen)

	OFFSET	`1,2`
	MATHEMATICA	`a = Table[0, {70}]; Do[b = n - EulerPhi[n]; If[b < 70 && a[[b + 1]] == 0, a[[b + 1]] = n], {n, 1, 10^4}]; a`
	CROSSREFS	`Adjacent sequences: A016094 A016095 A016096 this_sequence A016098 A016099 A016100` `Sequence in context: A061207 A140694 A074767 this_sequence A083717 A130041 A109987`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com)`

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Last modified October 10 20:39 EDT 2008. Contains 144831 sequences.

AT&T Labs Research