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A032289 as a simple table

n a(n)
1 1
2 1
3 2
4 4
5 9
6 20
7 49
8 119
9 305
10 790
11 2100
12 5648
13 15449
14 42664
15 119128
16 335310
17 951119
18 2714974
19 7795211
20 22493655
21 65202995
22 189767806
23 554326057
24 1624572250
25 4775504516
26 14076385819
27 41596613660
28 123206155126

[1,1,2,4,9,20,49,119,305,790,2100,5648,15449,
 42664,119128,335310,951119,2714974,7795211,
 22493655,65202995,189767806,554326057,1624572250,
 4775504516,14076385819,41596613660,123206155126]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)