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A215130 Odd squarefree n not divisible by 3 such that n/phi(n) > 2, where phi is Euler's totient function. 1
37182145, 46881835, 50115065, 59814755, 1078282205, 1152646495, 1375739365, 1453336885, 1524467945, 1598832235, 1734627895, 1747560815, 1759302545, 1854257405, 1922155235, 1966279315, 1970653685, 2015918905, 2054717665, 2099812715, 2154947795, 2193746555 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Terms in A091495 not divisible by 3.

The first 5000 terms are divisible by both 5 and 7. a(2276) = 112435426285 is the smallest term not divisible by 11. - Donovan Johnson, Nov 03 2013

LINKS

Donovan Johnson, Table of n, a(n) for n = 1..5000

PROG

(PARI) forstep(n=1, 2193746557, [4, 2], if(issquarefree(n), if(n/eulerphi(n)>2, print1(n ", "))))

CROSSREFS

Cf. A091495, A000010.

Sequence in context: A340713 A263347 A263560 * A286037 A034645 A204054

Adjacent sequences: A215127 A215128 A215129 * A215131 A215132 A215133

KEYWORD

nonn

AUTHOR

Donovan Johnson, Aug 04 2012

STATUS

approved

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Last modified November 28 12:20 EST 2022. Contains 358416 sequences. (Running on oeis4.)