A289665 Number of integers in the interval [2, A289663(n)] whose greatest prime factor is equal to the n-th popular prime A385503(n).

4, 14, 25, 77, 151, 428, 616, 1005, 1517, 2902, 7664, 7722, 8284, 48380, 161644, 698074, 2761234, 8357693, 9758410, 20285553, 21123128, 43031555, 96835113, 318539488, 534261087, 672081919, 873949289, 1997008416, 2720040151, 3321778833, 3663025425, 3924572413, 7241174991

Offset

1,1

Comments

See A385503 for further links and information.

Links

Table of n, a(n) for n=1..33.

Nathan McNew, Popular values of the largest prime divisor function (corrected version), page 16, November 2015.

Crossrefs

Cf. A006530, A385503, A289661-A289664.

Sequence in context: A391597 A116963 A094930 * A080286 A075381 A030572

Adjacent sequences: A289662 A289663 A289664 * A289666 A289667 A289668

Keyword

nonn

Author

N. J. A. Sloane, Jul 25 2017

Extensions

Edited, with terms updated from revised version of McNew, by Peter Munn, Jul 04 2025

Name corrected by Pontus von Brömssen, Jul 05 2025

Status

approved