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.

A166944 a(1)=2; a(n) = a(n-1) + gcd(n, a(n-1)) if n is even, a(n) = a(n-1) + gcd(n-2, a(n-1)) if n is odd.

Table of values

n a(n)
1 2
2 4
3 5
4 6
5 9
6 12
7 13
8 14
9 21
10 22
11 23
12 24
13 25
14 26
15 39
16 40
17 45
18 54
19 55
20 60
21 61
22 62
23 63
24 66
25 67
26 68
27 69
28 70
29 71
30 72
31 73
32 74
33 75
34 76
35 77
36 78
37 79
38 80
39 81
40 82
41 83
42 84
43 85
44 86
45 129
46 130
47 135
48 138
49 139
50 140
51 147
52 148
53 149
54 150
55 151
56 152
57 153
58 154
59 155
60 160
61 161
62 162
63 163

List of values

[2, 4, 5, 6, 9, 12, 13, 14, 21, 22, 23, 24, 25, 26, 39, 40, 45, 54, 55, 60, 61, 62, 63, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 129, 130, 135, 138, 139, 140, 147, 148, 149, 150, 151, 152, 153, 154, 155, 160, 161, 162, 163]

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

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