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A022631 as a simple table

n a(n)
0 1
1 3
2 9
3 28
4 69
5 174
6 413
7 933
8 2046
9 4391
10 9168
11 18675
12 37522
13 73725
14 142893
15 273159
16 514512
17 957666
18 1762837
19 3208884
20 5783727
21 10330732
22 18280590
23 32086827
24 55880614
25 96579240
26 165733335
27 282513246
28 478419366
29 805196022
30 1347288750
31 2241377166
32 3708721887

[1,3,9,28,69,174,413,933,2046,4391,9168,18675,
 37522,73725,142893,273159,514512,957666,1762837,
 3208884,5783727,10330732,18280590,32086827,
 55880614,96579240,165733335,282513246,478419366,
 805196022,1347288750,2241377166,3708721887]

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Last modified April 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)