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A148039 as a simple table

n a(n)
0 1
1 1
2 2
3 3
4 8
5 19
6 55
7 145
8 438
9 1319
10 4258
11 13442
12 44510
13 148574
14 512622
15 1765355
16 6199765
17 21989638
18 79344998
19 287621419
20 1052530049
21 3883860734
22 14482939260
23 54310810535
24 204858164609
25 777520351881
26 2972596559904
27 11423778936131
28 44092393135378
29 170962910891491
30 666445496840772
31 2609633213350411

[1,1,2,3,8,19,55,145,438,1319,4258,13442,44510,
 148574,512622,1765355,6199765,21989638,79344998,
 287621419,1052530049,3883860734,14482939260,
 54310810535,204858164609,777520351881,
 2972596559904,11423778936131,44092393135378,
 170962910891491,666445496840772,2609633213350411]

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Last modified September 25 00:48 EDT 2020. Contains 337333 sequences. (Running on oeis4.)