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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.

A051013 Number of nonaveraging subsets on {1,2,...,n}.

Table of values

n a(n)
0 1
1 2
2 4
3 7
4 13
5 23
6 40
7 65
8 106
9 169
10 278
11 443
12 705
13 1117
14 1760
15 2692
16 4151
17 6314
18 9526
19 14127
20 20944
21 30848
22 45589
23 66495
24 96847
25 140840
26 204380
27 293822
28 425859
29 613446
30 880288
31 1258349
32 1794256
33 2545965
34 3623774
35 5123746
36 7207773
37 10159163
38 14273328
39 19925242
40 27893419

List of values

[1, 2, 4, 7, 13, 23, 40, 65, 106, 169, 278, 443, 705, 1117, 1760, 2692, 4151, 6314, 9526, 14127, 20944, 30848, 45589, 66495, 96847, 140840, 204380, 293822, 425859, 613446, 880288, 1258349, 1794256, 2545965, 3623774, 5123746, 7207773, 10159163, 14273328, 19925242, 27893419]

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

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