A324584 Numbers n that share a prime factor with A276086(n).

3, 9, 10, 15, 20, 21, 25, 27, 33, 35, 39, 40, 42, 45, 49, 50, 51, 55, 56, 57, 63, 69, 70, 75, 77, 80, 81, 84, 85, 87, 91, 93, 98, 99, 100, 105, 110, 111, 112, 115, 117, 119, 123, 126, 129, 130, 133, 135, 140, 141, 145, 147, 153, 154, 159, 160, 161, 165, 168, 170, 171, 175, 177, 182, 183, 189, 190, 195, 196, 200, 201, 203, 205

Offset: 1

Author

Antti Karttunen, Mar 10 2019

Keywords

• nonn

Comments

Numbers n for which A324198(n) <> 1.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..10000
• Index entries for sequences related to primorial base
• Index entries for sequences related to primorial numbers

Crossrefs

Cf. A276086, A324198.

Cf. A324583 (complement).

Programs

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; };
A324198(n) = gcd(n,A276086(n));
for(n=1, oo, if(1!=A324198(n), print1(n, ", ")));