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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.

A080695 Concatenation of the prime power factors (with maximal exponent) of n; a(1) = 1 by convention.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 23
7 7
8 8
9 9
10 25
11 11
12 43
13 13
14 27
15 35
16 16
17 17
18 29
19 19
20 45
21 37
22 211
23 23
24 83
25 25
26 213
27 27
28 47
29 29
30 235
31 31
32 32
33 311
34 217
35 57
36 49
37 37
38 219
39 313
40 85
41 41
42 237
43 43
44 411
45 95
46 223
47 47
48 163
49 49
50 225
51 317
52 413
53 53
54 227
55 511
56 87
57 319
58 229
59 59
60 435
61 61
62 231
63 97
64 64

List of values

[1, 2, 3, 4, 5, 23, 7, 8, 9, 25, 11, 43, 13, 27, 35, 16, 17, 29, 19, 45, 37, 211, 23, 83, 25, 213, 27, 47, 29, 235, 31, 32, 311, 217, 57, 49, 37, 219, 313, 85, 41, 237, 43, 411, 95, 223, 47, 163, 49, 225, 317, 413, 53, 227, 511, 87, 319, 229, 59, 435, 61, 231, 97, 64]

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

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