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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.

A372960 Concatenation of the exponents in the prime factorization of 2*n-1.

Table of values

n a(n)
1 0
2 1
3 1
4 1
5 2
6 1
7 1
8 11
9 1
10 1
11 11
12 1
13 2
14 3
15 1
16 1
17 11
18 11
19 1
20 11
21 1
22 1
23 21
24 1
25 2
26 11
27 1
28 11
29 11
30 1
31 1
32 21
33 11
34 1
35 11
36 1
37 1
38 12
39 11
40 1
41 4
42 1
43 11
44 11
45 1
46 11
47 11
48 11
49 1
50 21
51 1
52 1
53 111
54 1
55 1
56 11
57 1
58 11
59 21
60 11
61 2
62 11
63 3
64 1
65 11
66 1
67 11
68 31
69 1
70 1
71 11
72 11
73 11
74 12
75 1
76 1
77 21

List of values

[0, 1, 1, 1, 2, 1, 1, 11, 1, 1, 11, 1, 2, 3, 1, 1, 11, 11, 1, 11, 1, 1, 21, 1, 2, 11, 1, 11, 11, 1, 1, 21, 11, 1, 11, 1, 1, 12, 11, 1, 4, 1, 11, 11, 1, 11, 11, 11, 1, 21, 1, 1, 111, 1, 1, 11, 1, 11, 21, 11, 2, 11, 3, 1, 11, 1, 11, 31, 1, 1, 11, 11, 11, 12, 1, 1, 21]

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