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A069797 Smallest k>n such that phi(n) divides phi(k). 3
2, 3, 4, 5, 8, 7, 9, 10, 13, 12, 22, 13, 21, 18, 16, 17, 32, 19, 27, 24, 26, 25, 46, 30, 33, 28, 37, 35, 58, 32, 61, 34, 41, 40, 39, 37, 57, 54, 45, 48, 55, 45, 49, 50, 52, 67, 94, 51, 86, 55, 64, 56, 106, 57, 75, 65, 63, 87, 118, 64, 77, 77, 73, 68, 97, 75, 134, 80, 89, 72 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Ivan Neretin, Table of n, a(n) for n = 1..10000

PROG

(PARI) for(s=1, 80, n=s+1; while(frac(eulerphi(n)/eulerphi(s))>0, n++); print1(n, ", "); )

CROSSREFS

Sequence in context: A080785 A319605 A245822 * A158979 A233249 A330573

Adjacent sequences:  A069794 A069795 A069796 * A069798 A069799 A069800

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, May 01 2002

STATUS

approved

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Last modified February 25 14:40 EST 2021. Contains 341609 sequences. (Running on oeis4.)