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A063687 as a simple table

n a(n)
0 1
1 1
2 1
3 2
4 3
5 6
6 10
7 21
8 38
9 84
10 156
11 352
12 677
13 1562
14 3054
15 7148
16 14196
17 33603
18 67474
19 161121
20 326519
21 785305
22 1603111
23 3878194
24 7965845
25 19365811
26 39983300
27 97610247
28 202424674
29 495955345
30 1032460679
31 2537529717
32 5300256499

[1,1,1,2,3,6,10,21,38,84,156,352,677,1562,3054,
 7148,14196,33603,67474,161121,326519,785305,
 1603111,3878194,7965845,19365811,39983300,
 97610247,202424674,495955345,1032460679,
 2537529717,5300256499]

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Last modified December 3 16:20 EST 2020. Contains 338906 sequences. (Running on oeis4.)