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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.

A117005 a(n) = A117000(n) - A117001(n).

Table of values

n a(n)
1 1
2 2
3 2
4 2
5 2
6 2
7 2
8 2
9 -1
10 2
11 2
12 -4
13 2
14 2
15 -4
16 2
17 2
18 -4
19 2
20 2
21 -4
22 2
23 2
24 -4
25 -3
26 2
27 -4
28 2
29 2
30 -14
31 2
32 2
33 -4
34 2
35 -8
36 -4
37 2
38 2
39 -4
40 -8
41 2
42 -4
43 2
44 2
45 -14
46 2
47 2
48 -4
49 9
50 -8
51 -4
52 2
53 2
54 -4
55 -8
56 16
57 -4
58 2
59 2
60 -14
61 2
62 2
63 10
64 2
65 -8
66 -4
67 2
68 2
69 -4
70 6
71 2
72 -4
73 2
74 2
75 -14
76 2
77 16
78 -4
79 2
80 -8
81 5
82 2
83 2
84 10
85 -8
86 2
87 -4
88 2
89 2
90 4
91 16
92 2
93 -4
94 2
95 -8
96 -4
97 2
98 16
99 14
100 -8

List of values

[1, 2, 2, 2, 2, 2, 2, 2, -1, 2, 2, -4, 2, 2, -4, 2, 2, -4, 2, 2, -4, 2, 2, -4, -3, 2, -4, 2, 2, -14, 2, 2, -4, 2, -8, -4, 2, 2, -4, -8, 2, -4, 2, 2, -14, 2, 2, -4, 9, -8, -4, 2, 2, -4, -8, 16, -4, 2, 2, -14, 2, 2, 10, 2, -8, -4, 2, 2, -4, 6, 2, -4, 2, 2, -14, 2, 16, -4, 2, -8, 5, 2, 2, 10, -8, 2, -4, 2, 2, 4, 16, 2, -4, 2, -8, -4, 2, 16, 14, -8]

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

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