cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-4 of 4 results.

A289661 a(n) is the smallest m such that p = n-th popular prime = A385503(n) is popular on the interval [2,m].

Original entry on oeis.org

2, 3, 45, 70, 1456, 4845, 20332, 46345, 106812, 153032, 592760, 2484190, 2620033, 2623860, 41163150, 237321819, 1966462280, 13690728506, 64322151699, 79838726306, 220355977754, 232268764689, 618745965579, 1882062393429, 9607711921430, 19364051434020, 26393150922356, 37636607775855, 114514665136326, 173974642506024, 228013323182523, 259772852488365, 284600479332862, 644741545074402
Offset: 1

Views

Author

N. J. A. Sloane, Jul 25 2017

Keywords

Comments

See A385503 for further links and information.

Links

Crossrefs

Cf. A006530, A385503, A289662-A289665.

Extensions

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

A289662 a(n) is the smallest m such that p = n-th popular prime = A385503(n) is uniquely popular on the interval [2,m] or -1 if p is never uniquely popular.

Original entry on oeis.org

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, 114514665167797, 173974642809066, 228013323978930, 259772858868378, 284600479573629, 644741545246282
Offset: 1

Views

Author

N. J. A. Sloane, Jul 25 2017

Keywords

Comments

See A385503 for further links and information.

Links

Crossrefs

Cf. A006530, A385503, A125624, A289661-A289665.

Extensions

Deleted "first" from definition. - N. J. A. Sloane, Oct 03 2019
Edited, and terms updated from revised version of McNew, by Peter Munn, Jul 04 2025

A289663 a(n) is the largest m such that p = n-th popular prime = A385503(n) is popular on the interval [2,m].

Original entry on oeis.org

17, 119, 279, 1858, 5471, 29301, 53474, 117303, 220523, 611374, 2642391, 2672025, 2952463, 41192601, 237611044, 1967277194, 13692930957, 64358549949, 79880100420, 220369251374, 232880841877, 618765808209, 1882062587041, 9607847299025, 19364476224949, 26396066576762, 37636861534247, 114519204438979, 173975018331581, 228013888964263, 259777078505983, 284734190312531, 644744279642231
Offset: 1

Views

Author

N. J. A. Sloane, Jul 25 2017

Keywords

Comments

There is a slight doubt about these numbers since McNew only carried a search up to a certain point.
See A385503 for further links and information.

Links

Crossrefs

Cf. A006530, A385503, A289661-A289665.

Extensions

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

A289664 Number of integers in the interval [2,A289661(n)] whose greatest prime factor is equal to the n-th popular prime A385503(n).

Original entry on oeis.org

1, 1, 8, 10, 67, 140, 344, 563, 947, 1197, 2846, 7357, 7621, 7629, 48357, 161507, 697875, 2760913, 8354317, 9754751, 20284680, 21082412, 43030537, 96835105, 318536223, 534252383, 672026918, 873944930, 1996949860, 2720035791, 3321772681, 3662980704, 3923186891, 7241151976
Offset: 1

Views

Author

N. J. A. Sloane, Jul 25 2017

Keywords

Comments

See A385503 for further links and information.

Links

Crossrefs

Cf. A006530, A385503, A289661-A289665.

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
Showing 1-4 of 4 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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