A324284 - OEIS

A324284

a(n) = gcd(n, A324283(n)).

1, 1, 3, 1, 1, 6, 1, 1, 3, 2, 1, 6, 1, 2, 3, 1, 1, 18, 1, 2, 3, 2, 1, 6, 25, 2, 3, 2, 1, 6, 1, 1, 3, 2, 5, 18, 1, 2, 3, 10, 1, 6, 1, 2, 45, 2, 1, 6, 7, 50, 3, 2, 1, 18, 5, 2, 3, 2, 1, 12, 1, 2, 3, 1, 5, 6, 1, 2, 3, 10, 1, 18, 1, 2, 75, 2, 1, 6, 1, 10, 3, 2, 1, 12, 5, 2, 3, 2, 1, 90, 1, 2, 3, 2, 5, 6, 1, 14, 9, 50, 1, 6, 1, 2, 15

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OFFSET

1,3

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..10000

Antti Karttunen, Data supplement: n, a(n) computed for n = 1..65537

FORMULA

a(n) = gcd(n, A324283(n)).

PROG

(PARI)

A276086(n) = { my(i=0, m=1, pr=1, nextpr); while((n>0), i=i+1; nextpr = prime(i)*pr; if((n%nextpr), m*=(prime(i)^((n%nextpr)/pr)); n-=(n%nextpr)); pr=nextpr); m; };

A324283(n) = { my(f=factor(n)); prod(i=1, #f~, A276086(f[i, 1]^f[i, 2])); };

A324284(n) = gcd(n, A324283(n));

CROSSREFS

Cf. A276086, A324283.

Sequence in context: A273169 A273167 A364113 * A300791 A069972 A115017

Adjacent sequences: A324281 A324282 A324283 * A324285 A324286 A324287

KEYWORD

nonn

AUTHOR

Antti Karttunen, Feb 20 2019

STATUS

approved