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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.

A162698 Numbers n such that the incidence matrix of the grid n X n has -1 as eigenvalue.

Table of values

n a(n)
1 4
2 5
3 9
4 11
5 14
6 17
7 19
8 23
9 24
10 29
11 34
12 35
13 39
14 41
15 44
16 47
17 49
18 53
19 54
20 59
21 64
22 65
23 69
24 71
25 74
26 77
27 79
28 83
29 84
30 89
31 94
32 95
33 99
34 101
35 104
36 107
37 109
38 113
39 114
40 119
41 124
42 125
43 129
44 131
45 134
46 137
47 139
48 143
49 144
50 149
51 154
52 155
53 159
54 161
55 164
56 167
57 169
58 173
59 174
60 179
61 184
62 185
63 189
64 191
65 194
66 197
67 199

List of values

[4, 5, 9, 11, 14, 17, 19, 23, 24, 29, 34, 35, 39, 41, 44, 47, 49, 53, 54, 59, 64, 65, 69, 71, 74, 77, 79, 83, 84, 89, 94, 95, 99, 101, 104, 107, 109, 113, 114, 119, 124, 125, 129, 131, 134, 137, 139, 143, 144, 149, 154, 155, 159, 161, 164, 167, 169, 173, 174, 179, 184, 185, 189, 191, 194, 197, 199]