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A161507 First occurrence of n in A161506. 1
1, 2, 6, 12, 30, 60, 420, 840, 27720, 360360, 6126120, 2677114440, 2406725881560 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
MATHEMATICA
func[n_] := Module[{d=Divisors[n], e=EulerPhi[n]}, Length[Select[d, #>e/2&]]]; k=1; Table[While[func[k]<n, k++ ]; k, {n, 11}]
CROSSREFS
Sequence in context: A129912 A283477 A182863 * A335711 A032177 A095349
KEYWORD
nonn,more
AUTHOR
T. D. Noe, Jun 17 2009
STATUS
approved

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Last modified February 21 06:16 EST 2024. Contains 370219 sequences. (Running on oeis4.)