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A340081 a(n) = gcd(n-1, A003958(n)). 6
1, 1, 2, 1, 4, 1, 6, 1, 4, 1, 10, 1, 12, 1, 2, 1, 16, 1, 18, 1, 4, 1, 22, 1, 8, 1, 2, 3, 28, 1, 30, 1, 4, 1, 2, 1, 36, 1, 2, 1, 40, 1, 42, 1, 4, 1, 46, 1, 12, 1, 2, 3, 52, 1, 2, 1, 4, 1, 58, 1, 60, 1, 2, 1, 16, 5, 66, 1, 4, 3, 70, 1, 72, 1, 2, 3, 4, 1, 78, 1, 16, 1, 82, 1, 4, 1, 2, 1, 88, 1, 18, 1, 4, 1, 2, 1, 96, 1, 2, 1, 100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..16384

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

FORMULA

a(n) = gcd(n-1, A003958(n)).

a(n) = A003958(n) / A340082(n).

For n > 1, a(n) = (n-1) / A340083(n).

PROG

(PARI)

A003958(n) = if(1==n, n, my(f=factor(n)); for(i=1, #f~, f[i, 1]--); factorback(f));

A340081(n) = gcd(n-1, A003958(n));

CROSSREFS

Cf. A003958, A340082, A340083.

Cf. also A049559, A340071.

Sequence in context: A257022 A214721 A324384 * A346467 A329641 A329638

Adjacent sequences:  A340078 A340079 A340080 * A340082 A340083 A340084

KEYWORD

nonn

AUTHOR

Antti Karttunen, Dec 28 2020

STATUS

approved

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Last modified September 26 06:16 EDT 2021. Contains 347664 sequences. (Running on oeis4.)