A354539 - OEIS

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A354539 as a simple table

n	a(n)
0	1
1	1
2	1
3	2
4	5
5	8
6	18
7	31
8	71
9	126
10	290
11	527
12	1218
13	2253
14	5223
15	9796
16	22763
17	43170
18	100502
19	192347
20	448476
21	864887
22	2019121
23	3919162
24	9159252
25	17877619
26	41819003
27	82021628
28	192015633

[1,1,1,2,5,8,18,31,71,126,290,527,1218,2253,5223, 9796,22763,43170,100502,192347,448476,864887, 2019121,3919162,9159252,17877619,41819003, 82021628,192015633]