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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.

A368696 Numbers whose arithmetic derivative (A003415) is a squarefree number of the form 4k+2.

Table of values

n a(n)
1 9
2 21
3 25
4 33
5 49
6 57
7 69
8 85
9 93
10 121
11 129
12 133
13 145
14 161
15 169
16 177
17 185
18 201
19 205
20 209
21 213
22 217
23 221
24 237
25 249
26 253
27 265
28 289
29 305
30 309
31 315
32 321
33 341
34 361
35 365
36 377
37 381
38 393
39 413
40 417
41 437
42 445
43 453
44 469
45 485
46 489
47 493
48 495
49 497
50 501
51 505
52 517
53 529
54 537
55 545
56 553
57 565
58 573
59 597
60 633
61 649
62 669
63 681
64 685
65 689

List of values

[9, 21, 25, 33, 49, 57, 69, 85, 93, 121, 129, 133, 145, 161, 169, 177, 185, 201, 205, 209, 213, 217, 221, 237, 249, 253, 265, 289, 305, 309, 315, 321, 341, 361, 365, 377, 381, 393, 413, 417, 437, 445, 453, 469, 485, 489, 493, 495, 497, 501, 505, 517, 529, 537, 545, 553, 565, 573, 597, 633, 649, 669, 681, 685, 689]

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

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