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A110130 as a simple table

n a(n)
0 1
1 0
2 2
3 4
4 22
5 136
6 504
7 5136
8 16966
9 240368
10 752800
11 13660480
12 41492284
13 918172848
14 2734083968
15 71399743744
16 209681631814
17 6312095369056
18 18348172005888
19 625558677709824
20 1804161160185748
21 68713071248064560

[1,0,2,4,22,136,504,5136,16966,240368,752800,
 13660480,41492284,918172848,2734083968,
 71399743744,209681631814,6312095369056,
 18348172005888,625558677709824,1804161160185748,
 68713071248064560]

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Last modified September 18 16:34 EDT 2024. Contains 376000 sequences. (Running on oeis4.)