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.

A230871 Construct a triangle as in the Comments, read nodes from left to right starting at the root and proceeding downwards.

Table of values

n a(n)
0 0
1 1
2 1
3 3
4 2
5 2
6 4
7 8
8 3
9 5
10 3
11 5
12 7
13 9
14 11
15 21
16 5
17 7
18 7
19 13
20 5
21 7
22 7
23 13
24 11
25 17
26 13
27 23
28 19
29 25
30 29
31 55
32 8
33 12
34 10
35 18
36 12
37 16
38 18
39 34
40 8
41 12
42 10
43 18
44 12
45 16
46 18
47 34
48 18
49 26
50 24
51 44
52 22
53 30
54 32
55 60
56 30
57 46
58 36
59 64
60 50
61 66
62 76
63 144
64 13
65 19
66 17
67 31
68 17
69 23

List of values

[0, 1, 1, 3, 2, 2, 4, 8, 3, 5, 3, 5, 7, 9, 11, 21, 5, 7, 7, 13, 5, 7, 7, 13, 11, 17, 13, 23, 19, 25, 29, 55, 8, 12, 10, 18, 12, 16, 18, 34, 8, 12, 10, 18, 12, 16, 18, 34, 18, 26, 24, 44, 22, 30, 32, 60, 30, 46, 36, 64, 50, 66, 76, 144, 13, 19, 17, 31, 17, 23]

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

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