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.

A191905 Composite deficient numbers k such that (product of proper divisors of k) mod (sum of proper divisors of k) is a prime number.

Table of values

n a(n)
1 4
2 9
3 10
4 25
5 33
6 39
7 49
8 57
9 91
10 93
11 98
12 105
13 111
14 119
15 121
16 145
17 155
18 169
19 183
20 185
21 187
22 189
23 201
24 205
25 209
26 215
27 225
28 235
29 237
30 242
31 245
32 265
33 289
34 291
35 299
36 305
37 327
38 335
39 351
40 355
41 361
42 371
43 403
44 413
45 415
46 417
47 425
48 427
49 437
50 469
51 471
52 475
53 485
54 493
55 497
56 515
57 527
58 529
59 535
60 543
61 549
62 553

List of values

[4, 9, 10, 25, 33, 39, 49, 57, 91, 93, 98, 105, 111, 119, 121, 145, 155, 169, 183, 185, 187, 189, 201, 205, 209, 215, 225, 235, 237, 242, 245, 265, 289, 291, 299, 305, 327, 335, 351, 355, 361, 371, 403, 413, 415, 417, 425, 427, 437, 469, 471, 475, 485, 493, 497, 515, 527, 529, 535, 543, 549, 553]

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

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