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.

A220478 Equilateral triangle from the snowflake (or E-toothpick) structure of A161330 (see Comments lines for definition).

Table of values

n a(n)
0 0
1 2
2 4
3 6
4 10
5 12
6 16
7 20
8 24
9 30
10 34
11 40
12 48
13 50
14 54
15 58
16 64
17 74
18 80
19 94
20 102
21 112
22 126
23 134
24 146
25 160
26 164
27 172
28 180
29 190
30 206
31 218
32 240
33 256
34 272
35 290
36 302
37 316
38 332
39 348
40 364
41 374
42 386
43 406
44 420
45 442
46 464
47 482
48 500
49 524
50 542
51 570
52 588
53 608
54 636
55 658
56 686
57 706
58 724
59 742

List of values

[0, 2, 4, 6, 10, 12, 16, 20, 24, 30, 34, 40, 48, 50, 54, 58, 64, 74, 80, 94, 102, 112, 126, 134, 146, 160, 164, 172, 180, 190, 206, 218, 240, 256, 272, 290, 302, 316, 332, 348, 364, 374, 386, 406, 420, 442, 464, 482, 500, 524, 542, 570, 588, 608, 636, 658, 686, 706, 724, 742]

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

Content is available under The OEIS End-User License Agreement.