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A070863 as a simple table

n a(n)
0 1
1 1
2 3
3 12
4 60
5 360
6 2268
7 18144
8 152544
9 1471008
10 14963328
11 179559936
12 2156963328
13 30197486592
14 426680825088
15 6448500066288
16 103658110188528
17 1865845983393504
18 33623263082197152
19 672465261643943040
20 13457623759369050240
21 283699943666342340480
22 6265115909183775026880

[1,1,3,12,60,360,2268,18144,152544,1471008,
 14963328,179559936,2156963328,30197486592,
 426680825088,6448500066288,103658110188528,
 1865845983393504,33623263082197152,
 672465261643943040,13457623759369050240,
 283699943666342340480,6265115909183775026880]

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)