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A157567 as a simple table

n a(n)
2 1
3 9
4 378
5 13330
6 689715
7 30934071
8 1463659596
9 72481823352
10 3407856306435
11 142400570465307
12 5478965101306950
13 198874787418398598
14 6919440283487706065
15 232730571288134765160
16 7599816260357477794632
17 241028324482889751669040

[1,9,378,13330,689715,30934071,1463659596,
 72481823352,3407856306435,142400570465307,
 5478965101306950,198874787418398598,
 6919440283487706065,232730571288134765160,
 7599816260357477794632,241028324482889751669040]

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Last modified July 2 16:09 EDT 2022. Contains 355029 sequences. (Running on oeis4.)