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.

A124017 Numbers n for which 2n-1, 4n-1, 8n-1, 16n-1 and 32n-1 are primes.

Table of values

n a(n)
1 45
2 90
3 26820
4 26925
5 30705
6 31710
7 33375
8 63420
9 63570
10 71805
11 83865
12 93075
13 103185
14 127140
15 134025
16 148050
17 170460
18 202635
19 211035
20 223305
21 269505
22 297225
23 303660
24 329175
25 335625
26 362505
27 387975
28 405270
29 405405
30 406425
31 409755
32 463335

List of values

[45, 90, 26820, 26925, 30705, 31710, 33375, 63420, 63570, 71805, 83865, 93075, 103185, 127140, 134025, 148050, 170460, 202635, 211035, 223305, 269505, 297225, 303660, 329175, 335625, 362505, 387975, 405270, 405405, 406425, 409755, 463335]