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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.

A178102 2^(absolute difference between prime factors of n-th semiprime) mod (n-th semiprime).

Table of values

n a(n)
1 1
2 2
3 1
4 8
5 4
6 4
7 16
8 6
9 1
10 20
11 25
12 26
13 4
14 10
15 10
16 12
17 1
18 13
19 9
20 43
21 44
22 16
23 61
24 52
25 56
26 16
27 62
28 16
29 22
30 22
31 64
32 70
33 24
34 44
35 80
36 28
37 59
38 30
39 72
40 1
41 92
42 31
43 97
44 106
45 34
46 106
47 36
48 4
49 136
50 110
51 64
52 40
53 40
54 9
55 42
56 1
57 133
58 134
59 46
60 81
61 64
62 146
63 151
64 152
65 121

List of values

[1, 2, 1, 8, 4, 4, 16, 6, 1, 20, 25, 26, 4, 10, 10, 12, 1, 13, 9, 43, 44, 16, 61, 52, 56, 16, 62, 16, 22, 22, 64, 70, 24, 44, 80, 28, 59, 30, 72, 1, 92, 31, 97, 106, 34, 106, 36, 4, 136, 110, 64, 40, 40, 9, 42, 1, 133, 134, 46, 81, 64, 146, 151, 152, 121]

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

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