A328475 - OEIS

A328475

Convert the primorial base expansion of n into its prime product form, then divide by the largest primorial which divides that product: a(n) = A111701(A276086(n)).

1, 1, 3, 1, 9, 3, 5, 5, 15, 1, 45, 3, 25, 25, 75, 5, 225, 15, 125, 125, 375, 25, 1125, 75, 625, 625, 1875, 125, 5625, 375, 7, 7, 21, 7, 63, 21, 35, 35, 105, 1, 315, 3, 175, 175, 525, 5, 1575, 15, 875, 875, 2625, 25, 7875, 75, 4375, 4375, 13125, 125, 39375, 375, 49, 49, 147, 49, 441, 147, 245, 245, 735, 7, 2205, 21, 1225, 1225, 3675, 35, 11025, 105

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OFFSET

0,3

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..2559

Antti Karttunen, Data supplement: n, a(n) computed for n = 0..32768

Index entries for sequences related to primorial base

FORMULA

a(n) = A111701(A276086(n)).

PROG

(PARI)

A111701(n) = forprime(p=2, , if(n%p, return(n), n /= p));