A101483 - OEIS

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A101483 as a simple table

n	a(n)
0	1
1	1
2	3
3	18
4	170
5	2220
6	37149
7	758814
8	18301950
9	508907970
10	16023271660
11	563336380167
12	21870097514265
13	929083211885920
14	42864992943282825
15	2134180938818369850
16	114045356939250133338
17	6510275427522198876426

[1,1,3,18,170,2220,37149,758814,18301950, 508907970,16023271660,563336380167,21870097514265, 929083211885920,42864992943282825, 2134180938818369850,114045356939250133338, 6510275427522198876426]