A285336 - OEIS

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A285336

a(n) = numerator of A065642(n)/n.

1, 2, 3, 2, 5, 2, 7, 2, 3, 2, 11, 3, 13, 2, 3, 2, 17, 4, 19, 2, 3, 2, 23, 3, 5, 2, 3, 2, 29, 2, 31, 2, 3, 2, 5, 4, 37, 2, 3, 5, 41, 2, 43, 2, 5, 2, 47, 9, 7, 8, 3, 2, 53, 4, 5, 7, 3, 2, 59, 3, 61, 2, 7, 2, 5, 2, 67, 2, 3, 2, 71, 4, 73, 2, 9, 2, 7, 2, 79, 5, 3, 2, 83, 3, 5, 2, 3, 2, 89, 4, 7, 2, 3, 2, 5, 9, 97, 8, 3, 8, 101, 2, 103, 2, 3, 2, 107, 4, 109, 2, 3

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

OFFSET

1,2

LINKS

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

PROG

(Scheme) (define (A285336 n) (numerator (/ (A065642 n) n)))

(Python)

from sympy import primefactors, prod, Integer

def a007947(n): return 1 if n<2 else prod(primefactors(n))

def a065642(n):

if n==1: return 1