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A047125 as a simple table

n a(n)
3 1
4 2
5 6
6 28
7 120
8 501
9 2020
10 8062
11 31992
12 126556
13 499478
14 1968504
15 7751812
16 30513489
17 120090702
18 472636988
19 1860354732
20 7323975621
21 28840527086
22 113600162826
23 447592682400
24 1764087889221
25 6954932056860
26 27428450072466

[1,2,6,28,120,501,2020,8062,31992,126556,499478,
 1968504,7751812,30513489,120090702,472636988,
 1860354732,7323975621,28840527086,113600162826,
 447592682400,1764087889221,6954932056860,
 27428450072466]

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Last modified January 20 03:25 EST 2022. Contains 350467 sequences. (Running on oeis4.)