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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.

A163873 a(n) = n - a(a(n-2)) with a(0) = a(1) = 0.

Table of values

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

List of values

[0, 0, 2, 3, 2, 2, 4, 5, 6, 7, 6, 6, 8, 9, 8, 8, 10, 11, 12, 13, 12, 12, 14, 15, 16, 17, 16, 16, 18, 19, 18, 18, 20, 21, 22, 23, 22, 22, 24, 25, 24, 24, 26, 27, 28, 29, 28, 28, 30, 31, 32, 33, 32, 32, 34, 35, 34, 34, 36, 37, 38, 39, 38, 38, 40, 41, 42, 43, 42, 42, 44, 45, 44, 44, 46]

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

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