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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.

A268649 G.f. A(x) satisfies: 1/(1-x) = Product_{n>=1} A( x^n/(1+x)^n ).

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 4
5 9
6 17
7 36
8 71
9 143
10 284
11 573
12 1140
13 2287
14 4568
15 9138
16 18272
17 36559
18 73098
19 146216
20 292413
21 584836
22 1169657
23 2339353
24 4678655
25 9357356
26 18714673
27 37429377
28 74858706
29 149717506
30 299434883
31 598869895
32 1197739689
33 2395479446
34 4790958784
35 9581917760
36 19163835261
37 38327670814
38 76655341388
39 153310682944
40 306621365618
41 613242731721
42 1226485462828
43 2452970926285
44 4905941852039
45 9811883704440
46 19623767408346
47 39247534817726
48 78495069634129

List of values

[1, 1, 1, 2, 4, 9, 17, 36, 71, 143, 284, 573, 1140, 2287, 4568, 9138, 18272, 36559, 73098, 146216, 292413, 584836, 1169657, 2339353, 4678655, 9357356, 18714673, 37429377, 74858706, 149717506, 299434883, 598869895, 1197739689, 2395479446, 4790958784, 9581917760, 19163835261, 38327670814, 76655341388, 153310682944, 306621365618, 613242731721, 1226485462828, 2452970926285, 4905941852039, 9811883704440, 19623767408346, 39247534817726, 78495069634129]

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