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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.

A007865 Number of sum-free subsets of {1, ..., n}.

Table of values

n a(n)
0 1
1 2
2 3
3 6
4 9
5 16
6 24
7 42
8 61
9 108
10 151
11 253
12 369
13 607
14 847
15 1400
16 1954
17 3139
18 4398
19 6976
20 9583
21 15456
22 20982
23 32816
24 45417
25 70109
26 94499
27 148234
28 200768
29 308213
30 415543
31 634270
32 849877
33 1311244
34 1739022
35 2630061
36 3540355
37 5344961
38 7051789
39 10747207
40 14158720
41 21295570
42 28188520

List of values

[1, 2, 3, 6, 9, 16, 24, 42, 61, 108, 151, 253, 369, 607, 847, 1400, 1954, 3139, 4398, 6976, 9583, 15456, 20982, 32816, 45417, 70109, 94499, 148234, 200768, 308213, 415543, 634270, 849877, 1311244, 1739022, 2630061, 3540355, 5344961, 7051789, 10747207, 14158720, 21295570, 28188520]

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

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