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.

A130762 A fold back triangular sequence for A003991: symmetrical folding and addition of.

Table of values

n a(n)
1 1
2 4
3 6
4 4
5 8
6 12
7 10
8 16
9 9
10 12
11 20
12 24
13 14
14 24
15 30
16 16
17 16
18 28
19 36
20 40
21 18
22 32
23 42
24 48
25 25
26 20
27 36
28 48
29 56
30 60
31 22
32 40
33 54
34 64
35 70
36 36
37 24
38 44
39 60
40 72
41 80
42 84
43 26
44 48
45 66
46 80
47 90
48 96
49 49
50 28
51 52
52 72
53 88
54 100
55 108
56 112
57 30
58 56
59 78
60 96
61 110
62 120
63 126
64 64
65 32
66 60
67 84
68 104
69 120

List of values

[1, 4, 6, 4, 8, 12, 10, 16, 9, 12, 20, 24, 14, 24, 30, 16, 16, 28, 36, 40, 18, 32, 42, 48, 25, 20, 36, 48, 56, 60, 22, 40, 54, 64, 70, 36, 24, 44, 60, 72, 80, 84, 26, 48, 66, 80, 90, 96, 49, 28, 52, 72, 88, 100, 108, 112, 30, 56, 78, 96, 110, 120, 126, 64, 32, 60, 84, 104, 120]

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

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