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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.

A245015 Numbers n such that sigma(n) is a factorial.

Table of values

n a(n)
1 1
2 5
3 14
4 15
5 23
6 54
7 56
8 87
9 95
10 264
11 270
12 280
13 354
14 376
15 406
16 418
17 435
18 459
19 478
20 537
21 623
22 649
23 667
24 719
25 1560
26 1740
27 1824
28 1836
29 1992
30 2148
31 2214
32 2262
33 2296
34 2392
35 2470
36 2492
37 2514
38 2528
39 2596
40 2668
41 2876
42 3058
43 3154
44 3471
45 3567
46 3777
47 3835
48 3895
49 4147
50 4195
51 4199

List of values

[1, 5, 14, 15, 23, 54, 56, 87, 95, 264, 270, 280, 354, 376, 406, 418, 435, 459, 478, 537, 623, 649, 667, 719, 1560, 1740, 1824, 1836, 1992, 2148, 2214, 2262, 2296, 2392, 2470, 2492, 2514, 2528, 2596, 2668, 2876, 3058, 3154, 3471, 3567, 3777, 3835, 3895, 4147, 4195, 4199]

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

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