A228811 GCD's arising in A228810.

11, 43, 11, 11, 121, 11, 11, 1153, 109, 97, 11, 11, 11, 11, 11, 19, 2909, 6221, 297889, 3, 3

Offset

1,1

Links

Table of n, a(n) for n=1..21.

Wikipedia, Greatest common divisor

Prog

(PARI) isA000430(n)=isprime(n) || (issquare(n, &n) && isprime(n))
t=0; for(n=2, 1e6, t+=1/(n-1); if(!isA000430(n) && gcd(n, numerator(t))>1, print1(gcd(n, numerator(t))", "))) \\ Charles R Greathouse IV, Sep 04 2013

Crossrefs

Cf. A001008, A228810.

Sequence in context: A027978 A050489 A156533 * A096638 A089712 A359664

Adjacent sequences: A228808 A228809 A228810 * A228812 A228813 A228814

Keyword

nonn

Author

Arkadiusz Wesolowski, Sep 04 2013

Extensions

a(14)-a(15) from Charles R Greathouse IV, Sep 04 2013

a(16)-a(21) from Charles R Greathouse IV, Sep 09 2013

Status

approved