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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.

A364914 Number of subsets of {1..n} such that some element can be written as a nonnegative linear combination of the others.

Table of values

n a(n)
0 0
1 0
2 1
3 3
4 9
5 20
6 48
7 101
8 219
9 454
10 944
11 1917
12 3925
13 7915
14 16004
15 32188
16 64751
17 129822
18 260489
19 521672
20 1045060
21 2091808
22 4187047
23 8377255
24 16762285
25 33531228
26 67077485
27 134170217
28 268371678
29 536772231
30 1073611321
31 2147282291
32 4294697258
33 8589527163
34 17179321094

List of values

[0, 0, 1, 3, 9, 20, 48, 101, 219, 454, 944, 1917, 3925, 7915, 16004, 32188, 64751, 129822, 260489, 521672, 1045060, 2091808, 4187047, 8377255, 16762285, 33531228, 67077485, 134170217, 268371678, 536772231, 1073611321, 2147282291, 4294697258, 8589527163, 17179321094]

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

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