A346469 - OEIS

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A346469

a(n) = A340070(A276086(n)).

0, 1, 1, 5, 3, 3, 1, 7, 8, 31, 3, 3, 5, 5, 5, 5, 120, 15, 25, 25, 50, 25, 75, 75, 125, 125, 125, 125, 750, 375, 1, 9, 10, 41, 3, 3, 12, 59, 71, 247, 3, 3, 5, 5, 5, 5, 15, 15, 50, 25, 25, 25, 75, 75, 375, 125, 125, 125, 375, 375, 7, 7, 7, 7, 210, 21, 7, 7, 7, 7, 21, 21, 420, 35, 35, 35, 7455, 105, 175, 175, 175, 3325

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,4

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..11550

Index entries for sequences related to primorial base

FORMULA

a(n) = A340070(A276086(n)) = gcd(A327860(n), A329029(n)).

For n >= 1, a(n) = A327860(n) / A345930(n).

PROG

(PARI) A346469(n) = { my(s=0, t=0, m=1, p=2, e); while(n, e = (n%p); if(e, m *= (p^e); s += (1/p); t += (e/p)); n = n\p; p = nextprime(1+p)); (gcd(s, t)*m); };

CROSSREFS

Cf. A003415, A069359, A276086, A327860, A329029, A340070, A345930.

Cf. also A346471.

Sequence in context: A064812 A282469 A216998 * A068118 A076104 A094284

Adjacent sequences: A346466 A346467 A346468 * A346470 A346471 A346472

KEYWORD

nonn,base,look

AUTHOR

Antti Karttunen, Jul 21 2021

STATUS

approved