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A072050 Smallest solution to GCD(x,A004086(x))=7^n. 4
7, 18718, 343, 125204947, 231012215, 11298657013, 211066659013, 117088913464607, 2846847905744815, 108244538579770418, 2080795357577501075, 18312871825384462928, 26268977180287044053417, 1734582041294009627423816 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..14.

FORMULA

a(n) = A069554(7^n).

MATHEMATICA

See A071686.

CROSSREFS

Cf. A004086, A055483, A069554, A071686, A072005, A072021.

Sequence in context: A115997 A013786 A285178 * A249765 A201037 A300200

Adjacent sequences:  A072047 A072048 A072049 * A072051 A072052 A072053

KEYWORD

nonn,base,more

AUTHOR

Labos Elemer, Jun 10 2002

EXTENSIONS

a(8)-a(9) from Max Alekseyev, Jun 17 2011

a(10)-a(14) from Giovanni Resta, Oct 30 2019

STATUS

approved

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Last modified May 15 13:20 EDT 2021. Contains 343920 sequences. (Running on oeis4.)