A289662 a(n) is the smallest m such that p = n-th popular prime = A124661(n) is uniquely popular on the interval [2,m].

2, 12, 80, 196, 1638, 4864, 22425, 46500, 109779, 158625, 603564, 2552416, 2620142, 2627250, 41163747, 237398795, 1966466950, 13690729828, 64322158656, 79838739611, 220355987735, 232268774850, 618745972214, 1882062476406, 9607713772982, 19364051829855, 26393150937218, 37636607806688, 84128837898780, 85992223800358

Offset

1,1

References

Nathan McNew, The Most Frequent Values of the Largest Prime Divisor Function, Exper. Math., 2017, Vol. 26, No. 2, 210-224; http://dx.doi.org/10.1080/10586458.2016.115518

Links

Table of n, a(n) for n=1..30.

Nathan McNew, Popular values of the largest prime divisor function, arXiv:1504.05985 [math.NT], 2015.

Crossrefs

Cf. A006530, A124661, A125624, A289661-A289665.

Sequence in context: A062871 A306272 A227968 * A107632 A270775 A240836

Adjacent sequences: A289659 A289660 A289661 * A289663 A289664 A289665

Keyword

nonn

Author

N. J. A. Sloane, Jul 25 2017

Extensions

Deleted "first" from definition. - N. J. A. Sloane, Oct 03 2019

Status

approved