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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.

A371791 Number of biquanimous subsets of {1..n}. Sets with a subset having the same sum as the complement.

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 4
5 8
6 18
7 38
8 82
9 175
10 373
11 787
12 1651
13 3439
14 7126
15 14667
16 30049
17 61249
18 124440
19 251922
20 508779
21 1025183
22 2062287
23 4142644
24 8312927
25 16667005
26 33395275
27 66880828
28 133892910
29 267976571
30 536225921
31 1072842931
32 2146233971
33 4293248183
34 8587569636
35 17176654105
36 34355356676
37 68713584720
38 137430991937
39 274867311960
40 549741605972
41 1099492913172
42 2198998307679
43 4398013970156
44 8796049891377
45 17592130283755
46 35184298506429

List of values

[1, 1, 1, 2, 4, 8, 18, 38, 82, 175, 373, 787, 1651, 3439, 7126, 14667, 30049, 61249, 124440, 251922, 508779, 1025183, 2062287, 4142644, 8312927, 16667005, 33395275, 66880828, 133892910, 267976571, 536225921, 1072842931, 2146233971, 4293248183, 8587569636, 17176654105, 34355356676, 68713584720, 137430991937, 274867311960, 549741605972, 1099492913172, 2198998307679, 4398013970156, 8796049891377, 17592130283755, 35184298506429]

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