A215130 Odd squarefree n not divisible by 3 such that n/phi(n) > 2, where phi is Euler's totient function.

37182145, 46881835, 50115065, 59814755, 1078282205, 1152646495, 1375739365, 1453336885, 1524467945, 1598832235, 1734627895, 1747560815, 1759302545, 1854257405, 1922155235, 1966279315, 1970653685, 2015918905, 2054717665, 2099812715, 2154947795, 2193746555

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