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.

A328787 Number of distinct sizes of equilateral triangles with vertices in an equilateral triangular array of points with n rows.

Table of values

n a(n)
2 1
3 2
4 4
5 6
6 8
7 11
8 14
9 17
10 21
11 25
12 28
13 33
14 38
15 43
16 49
17 54
18 59
19 66
20 73
21 80
22 87
23 93
24 100
25 109
26 116
27 124
28 133
29 142
30 150
31 161
32 172
33 181
34 191
35 201
36 211
37 224
38 234
39 246
40 258
41 271
42 282
43 295
44 307
45 319
46 333
47 346
48 359
49 375
50 389
51 403
52 420
53 435
54 448
55 465
56 482
57 499
58 514

List of values

[1, 2, 4, 6, 8, 11, 14, 17, 21, 25, 28, 33, 38, 43, 49, 54, 59, 66, 73, 80, 87, 93, 100, 109, 116, 124, 133, 142, 150, 161, 172, 181, 191, 201, 211, 224, 234, 246, 258, 271, 282, 295, 307, 319, 333, 346, 359, 375, 389, 403, 420, 435, 448, 465, 482, 499, 514]

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

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