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.

A359161 Numbers of the form 4u+1 with an even number of prime factors (counted with multiplicity).

Table of values

n a(n)
1 1
2 9
3 21
4 25
5 33
6 49
7 57
8 65
9 69
10 77
11 81
12 85
13 93
14 121
15 129
16 133
17 141
18 145
19 161
20 169
21 177
22 185
23 189
24 201
25 205
26 209
27 213
28 217
29 221
30 225
31 237
32 249
33 253
34 265
35 289
36 297
37 301
38 305
39 309
40 321
41 329
42 341
43 361
44 365
45 377
46 381
47 393
48 413
49 417
50 437
51 441
52 445
53 453
54 469
55 473
56 481
57 485
58 489
59 493
60 497
61 501
62 505
63 513

List of values

[1, 9, 21, 25, 33, 49, 57, 65, 69, 77, 81, 85, 93, 121, 129, 133, 141, 145, 161, 169, 177, 185, 189, 201, 205, 209, 213, 217, 221, 225, 237, 249, 253, 265, 289, 297, 301, 305, 309, 321, 329, 341, 361, 365, 377, 381, 393, 413, 417, 437, 441, 445, 453, 469, 473, 481, 485, 489, 493, 497, 501, 505, 513]

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

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