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.

A145606 Largest number x such that x and x+1 are prime(n)-smooth but not prime(n-1)-smooth.

Table of values

n a(n)
1 1
2 8
3 80
4 4374
5 9800
6 123200
7 336140
8 11859210
9 5142500
10 177182720
11 1611308699
12 3463199999
13 63927525375
14 421138799639
15 1109496723125
16 1453579866024
17 20628591204480
18 31887350832896
19 12820120234375
20 119089041053696
21 2286831727304144
22 9591468737351909375
23 17451620110781856
24 166055401586083680
25 49956990469100000
26 4108258965739505499
27 19316158377073923834000
28 386539843111191224

List of values

[1, 8, 80, 4374, 9800, 123200, 336140, 11859210, 5142500, 177182720, 1611308699, 3463199999, 63927525375, 421138799639, 1109496723125, 1453579866024, 20628591204480, 31887350832896, 12820120234375, 119089041053696, 2286831727304144, 9591468737351909375, 17451620110781856, 166055401586083680, 49956990469100000, 4108258965739505499, 19316158377073923834000, 386539843111191224]

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

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