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A042981 as a simple table

n a(n)
1 1
2 0
3 1
4 1
5 1
6 3
7 4
8 8
9 15
10 24
11 48
12 85
13 155
14 297
15 541
16 1024
17 1935
18 3626
19 6912
20 13107
21 24940
22 47709
23 91136
24 174760
25 335626
26 645120
27 1242904
28 2396745
29 4627915
30 8948385
31 17317888
32 33554432
33 65076240
34 126320640
35 245428574
36 477218560
37 928638035
38 1808414181
39 3524068955
40 6871947672
41 13408691175
42 26178823218

[1,0,1,1,1,3,4,8,15,24,48,85,155,297,541,1024,
 1935,3626,6912,13107,24940,47709,91136,174760,
 335626,645120,1242904,2396745,4627915,8948385,
 17317888,33554432,65076240,126320640,245428574,
 477218560,928638035,1808414181,3524068955,
 6871947672,13408691175,26178823218]

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Last modified August 7 17:44 EDT 2020. Contains 336278 sequences. (Running on oeis4.)