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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.

A212657 Number of subsets of {1,2,...,n} with the sum of reciprocals <= 1.

Table of values

n a(n)
0 1
1 2
2 3
3 5
4 8
5 14
6 26
7 46
8 83
9 151
10 276
11 503
12 921
13 1689
14 3113
15 5730
16 10549
17 19441
18 35868
19 66209
20 122316
21 226157
22 418373
23 774394
24 1434130
25 2657246
26 4925837
27 9135444
28 16949660
29 31460444
30 58415377
31 108502932
32 201604081
33 374708242
34 696650259
35 1295562800
36 2410001851
37 4484208954
38 8345621293

List of values

[1, 2, 3, 5, 8, 14, 26, 46, 83, 151, 276, 503, 921, 1689, 3113, 5730, 10549, 19441, 35868, 66209, 122316, 226157, 418373, 774394, 1434130, 2657246, 4925837, 9135444, 16949660, 31460444, 58415377, 108502932, 201604081, 374708242, 696650259, 1295562800, 2410001851, 4484208954, 8345621293]

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

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