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A320091 as a simple table

n a(n)
1 1
2 7
3 55
4 391
5 2791
6 19543
7 137191
8 960391
9 6725143
10 47076343
11 329551591
12 2306861191
13 16148148391
14 113037041143
15 791260111543
16 5538820797943
17 38771751367543
18 271402259573191
19 1899815857483639
20 13298711002502839
21 93090977299997143
22 651636841100805895

[1,7,55,391,2791,19543,137191,960391,6725143,
 47076343,329551591,2306861191,16148148391,
 113037041143,791260111543,5538820797943,
 38771751367543,271402259573191,1899815857483639,
 13298711002502839,93090977299997143,
 651636841100805895]

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Last modified April 24 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)