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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.

A338321 Trace of complement matrix for polynomial triangle centers of degree n (on the Nagel line).

Table of values

n a(n)
1 1
2 3
3 4
4 5
5 6
6 9
7 9
8 12
9 14
10 16
11 18
12 22
13 23
14 27
15 30
16 33
17 36
18 41
19 43
20 48
21 52
22 56
23 60
24 66
25 69
26 75
27 80
28 85
29 90
30 97
31 101
32 108
33 114
34 120
35 126
36 134
37 139
38 147
39 154
40 161
41 168
42 177
43 183
44 192
45 200
46 208
47 216
48 226
49 233
50 243
51 252
52 261
53 270
54 281
55 289
56 300
57 310
58 320
59 330

List of values

[1, 3, 4, 5, 6, 9, 9, 12, 14, 16, 18, 22, 23, 27, 30, 33, 36, 41, 43, 48, 52, 56, 60, 66, 69, 75, 80, 85, 90, 97, 101, 108, 114, 120, 126, 134, 139, 147, 154, 161, 168, 177, 183, 192, 200, 208, 216, 226, 233, 243, 252, 261, 270, 281, 289, 300, 310, 320, 330]