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.

A233781 Number of toothpicks or D-toothpicks added at n-th stage to the structure of the D-toothpick "wide" triangle of A233780.

Table of values

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

List of values

[0, 1, 2, 2, 4, 2, 4, 6, 8, 2, 4, 6, 10, 10, 8, 14, 16, 2, 4, 6, 10, 10, 10, 18, 24, 18, 8, 14, 22, 26, 16, 30, 32, 2, 4, 6, 10, 10, 10, 18, 24, 18, 10, 18, 30, 38, 26, 42, 52, 34, 8, 14, 22, 26, 22, 42, 56, 50, 16, 30, 46, 58, 32, 62, 64, 2, 4, 6, 10, 10]

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

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