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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
PROG
(PARI) forstep(n=1, 2193746557, [4, 2], if(issquarefree(n), if(n/eulerphi(n)>2, print1(n ", "))))
CROSSREFS
Sequence in context: A340713 A263347 A263560 * A286037 A034645 A204054
KEYWORD
nonn
AUTHOR
Donovan Johnson, Aug 04 2012
STATUS
approved

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Last modified March 29 09:32 EDT 2024. Contains 371268 sequences. (Running on oeis4.)