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A022894 as a simple table

n a(n)
0 0
1 1
2 1
3 2
4 5
5 13
6 39
7 122
8 392
9 1286
10 4341
11 14860
12 51085
13 178402
14 634511
15 2260918
16 8067237
17 29031202
18 105250449
19 383579285
20 1404666447
21 5171065198
22 19141008044
23 71124987313
24 263548339462
25 983424096451
26 3684422350470
27 13818161525284
28 51938115653565

[0,1,1,2,5,13,39,122,392,1286,4341,14860,51085,
 178402,634511,2260918,8067237,29031202,105250449,
 383579285,1404666447,5171065198,19141008044,
 71124987313,263548339462,983424096451,
 3684422350470,13818161525284,51938115653565]

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)