cp's OEIS Frontend

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.

A383730 a(0) = 0, a(n) = a(n-1) + A002260(n) * (-1)^(n-1) if not already in the sequence, otherwise a(n) = a(n-1) - A002260(n) * (-1)^(n-1).

Table of values

n a(n)
0 0
1 1
2 2
3 4
4 3
5 5
6 8
7 9
8 7
9 10
10 6
11 5
12 7
13 4
14 8
15 13
16 12
17 14
18 11
19 15
20 20
21 26
22 25
23 27
24 24
25 28
26 23
27 29
28 22
29 21
30 19
31 16
32 20
33 15
34 21
35 14
36 22
37 21
38 23
39 20
40 24
41 19
42 25
43 32
44 40
45 49
46 48
47 50
48 47
49 51
50 46
51 52
52 45
53 53
54 44
55 54
56 55
57 57
58 60
59 64
60 59
61 65
62 58
63 66
64 75
65 85
66 74
67 73
68 71

List of values

[0, 1, 2, 4, 3, 5, 8, 9, 7, 10, 6, 5, 7, 4, 8, 13, 12, 14, 11, 15, 20, 26, 25, 27, 24, 28, 23, 29, 22, 21, 19, 16, 20, 15, 21, 14, 22, 21, 23, 20, 24, 19, 25, 32, 40, 49, 48, 50, 47, 51, 46, 52, 45, 53, 44, 54, 55, 57, 60, 64, 59, 65, 58, 66, 75, 85, 74, 73, 71]

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