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URL: https://oeis.org/A069714

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A069714

Least integer k such that (sigma(k)-k)/(k-phi(k)) = n.

2

2, 12, 1320, 851760, 124176229632000

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OFFSET

1,1

COMMENTS

10^11 < a(5) <= 124176229632000. - Donovan Johnson, Oct 22 2011

LINKS

Table of n, a(n) for n=1..5.

FORMULA

a(n) = Min{x: A001065(x) / A051953(x) = n}.

CROSSREFS

Cf. A068414, A068418, A001065, A051953, A000010, A000203.

Sequence in context: A022482 A372198 A081701 * A176391 A123743 A111180

Adjacent sequences: A069711 A069712 A069713 * A069715 A069716 A069717

KEYWORD

more,nonn

AUTHOR

Labos Elemer, Apr 02 2002

EXTENSIONS

a(5) confirmed by Jud McCranie, Jan 20 2026

STATUS

approved