A246603 -a(n) is the greatest negative primitive root that all of the first n primes share.

1, 1, 7, 37, 37, 37, 37, 1423, 10987, 13297, 219277, 219277, 669463, 2215987, 7841563, 33376753, 54444163, 112545673, 267625087, 1676296087, 2772262903, 2782012963, 4341199657, 34694683237, 39965586763, 232265913427, 1879768081657, 1879768081657

Offset: 1

Author

N. J. A. Sloane, Sep 09 2014

Keywords

• nonn

References

• Don Reble, Posting to Sequence Fans Mailing List, Sep 07 2014

Crossrefs

Cf. A002199, A128895.