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.

A280296 Squarefree numbers k such that 2^k - 1 is divisible by a square > 1.

Table of values

n a(n)
1 6
2 21
3 30
4 42
5 66
6 78
7 102
8 105
9 110
10 114
11 138
12 155
13 174
14 186
15 210
16 222
17 231
18 246
19 253
20 258
21 273
22 282
23 310
24 318
25 330
26 354
27 357
28 366
29 390
30 399
31 402
32 426
33 438
34 462
35 465
36 474
37 483
38 498
39 506
40 510
41 534
42 546
43 570
44 582
45 602
46 606
47 609
48 618
49 642
50 651
51 654
52 678
53 690
54 714
55 759
56 762
57 770
58 777
59 786
60 798
61 822

List of values

[6, 21, 30, 42, 66, 78, 102, 105, 110, 114, 138, 155, 174, 186, 210, 222, 231, 246, 253, 258, 273, 282, 310, 318, 330, 354, 357, 366, 390, 399, 402, 426, 438, 462, 465, 474, 483, 498, 506, 510, 534, 546, 570, 582, 602, 606, 609, 618, 642, 651, 654, 678, 690, 714, 759, 762, 770, 777, 786, 798, 822]

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

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