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Search: id:A161507
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A161507 First occurrence of n in A161506. +0
2
1, 2, 6, 12, 30, 60, 420, 840, 27720, 360360, 6126120, 2677114440, 2406725881560 (list; graph; listen)
OFFSET

1,2

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: A162214 A100071 A129912 this_sequence A032177 A095349 A022916

Adjacent sequences: A161504 A161505 A161506 this_sequence A161508 A161509 A161510

KEYWORD

nonn

AUTHOR

T. D. Noe (noe(AT)sspectra.com), Jun 17 2009

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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