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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.

A023528 Exponent of 2 in prime factorization of prime(n)*prime(n-1) + 1.

Table of values

n a(n)
1 0
2 0
3 4
4 2
5 1
6 4
7 1
8 2
9 1
10 2
11 2
12 2
13 1
14 2
15 1
16 2
17 3
18 4
19 3
20 1
21 6
22 3
23 1
24 2
25 1
26 1
27 2
28 1
29 4
30 1
31 4
32 1
33 2
34 2
35 3
36 2
37 2
38 3
39 1
40 2
41 3
42 4
43 2
44 12
45 1
46 2
47 1
48 1
49 1
50 4
51 1
52 3
53 8
54 2
55 2
56 3
57 2
58 2
59 2
60 1
61 2
62 3
63 5
64 1
65 6
66 1
67 5
68 2
69 2
70 4
71 1
72 3
73 1
74 2
75 3
76 1
77 2
78 1
79 1
80 1

List of values

[0, 0, 4, 2, 1, 4, 1, 2, 1, 2, 2, 2, 1, 2, 1, 2, 3, 4, 3, 1, 6, 3, 1, 2, 1, 1, 2, 1, 4, 1, 4, 1, 2, 2, 3, 2, 2, 3, 1, 2, 3, 4, 2, 12, 1, 2, 1, 1, 1, 4, 1, 3, 8, 2, 2, 3, 2, 2, 2, 1, 2, 3, 5, 1, 6, 1, 5, 2, 2, 4, 1, 3, 1, 2, 3, 1, 2, 1, 1, 1]

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