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A331606 as a simple table

n a(n)
1 1
2 1
3 4
4 4
5 12
6 18
7 44
8 72
9 158
10 288
11 604
12 1146
13 2332
14 4528
15 9126
16 17944
17 35940
18 71130
19 142132
20 282344
21 563630
22 1121936
23 2239060
24 4462530
25 8906236
26 17764160
27 35458774
28 70761520
29 141272876
30 282025466
31 563159588
32 1124543256
33 2245918406
34 4485670168
35 8960061076

[1,1,4,4,12,18,44,72,158,288,604,1146,2332,4528,
 9126,17944,35940,71130,142132,282344,563630,
 1121936,2239060,4462530,8906236,17764160,35458774,
 70761520,141272876,282025466,563159588,1124543256,
 2245918406,4485670168,8960061076]

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Last modified September 19 17:19 EDT 2021. Contains 347564 sequences. (Running on oeis4.)