A345670 - OEIS

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A345670 as a simple table

n	a(n)
0	1
1	3
2	11
3	44
4	22
5	16685
6	5325
7	1775
8	710
9	355
10	104348
11	312689
12	1146408
13	20530996
14	10838702
15	5419351
16	165707065
17	411557987

[1,3,11,44,22,16685,5325,1775,710,355,104348, 312689,1146408,20530996,10838702,5419351, 165707065,411557987]