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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.

A353086 Column -1 of the extended Trithoff (Tribonacci) array.

Table of values

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

List of values

[0, 1, 1, 2, 3, 3, 4, 5, 5, 6, 7, 7, 8, 8, 9, 10, 10, 11, 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 21, 22, 23, 23, 24, 25, 25, 26, 27, 27, 28, 29, 29, 30, 31, 31, 32, 32, 33, 34, 34, 35, 36, 36, 37, 38, 38, 39, 40, 40, 41, 42, 42, 43, 44, 44, 45, 45, 46, 47, 47, 48, 49, 49, 50]

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