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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.

A326979 BII-numbers of T_1 set-systems.

Table of values

n a(n)
1 0
2 1
3 2
4 3
5 7
6 8
7 9
8 10
9 11
10 15
11 25
12 27
13 30
14 31
15 42
16 43
17 45
18 47
19 51
20 52
21 53
22 54
23 55
24 59
25 60
26 61
27 62
28 63
29 75
30 79
31 91
32 94
33 95
34 107
35 109
36 111
37 115
38 116
39 117
40 118
41 119
42 123
43 124
44 125
45 126
46 127
47 128
48 129
49 130
50 131
51 135
52 136
53 137
54 138
55 139
56 143
57 153
58 155
59 158
60 159

List of values

[0, 1, 2, 3, 7, 8, 9, 10, 11, 15, 25, 27, 30, 31, 42, 43, 45, 47, 51, 52, 53, 54, 55, 59, 60, 61, 62, 63, 75, 79, 91, 94, 95, 107, 109, 111, 115, 116, 117, 118, 119, 123, 124, 125, 126, 127, 128, 129, 130, 131, 135, 136, 137, 138, 139, 143, 153, 155, 158, 159]