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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.

A105637 a(n) = a(n-2) + a(n-3) - a(n-5).

Table of values

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

List of values

[0, 1, 2, 1, 3, 3, 3, 4, 5, 4, 6, 6, 6, 7, 8, 7, 9, 9, 9, 10, 11, 10, 12, 12, 12, 13, 14, 13, 15, 15, 15, 16, 17, 16, 18, 18, 18, 19, 20, 19, 21, 21, 21, 22, 23, 22, 24, 24, 24, 25, 26, 25, 27, 27, 27, 28, 29, 28, 30, 30, 30, 31, 32, 31, 33, 33, 33, 34, 35, 34, 36, 36, 36, 37, 38, 37]

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

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