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A007832 as a simple table

n a(n)
1 1
2 1
3 2
4 8
5 52
6 457
7 4979
8 64591
9 972906
10 16701834
11 322063458
12 6894918021
13 162316253829
14 4168330738093
15 115980086558470
16 3476156853885992
17 111665862911781864
18 3827642575341002133
19 139457935266705019299
20 5382149182666970080019
21 219344947692643001216702

[1,1,2,8,52,457,4979,64591,972906,16701834,
 322063458,6894918021,162316253829,4168330738093,
 115980086558470,3476156853885992,
 111665862911781864,3827642575341002133,
 139457935266705019299,5382149182666970080019,
 219344947692643001216702]

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Last modified December 12 22:06 EST 2019. Contains 329963 sequences. (Running on oeis4.)