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A177409 as a simple table

n a(n)
1 1
2 2
3 12
4 108
5 1208
6 15536
7 220832
8 3390480
9 55411872
10 954553664
11 17211258240
12 323148560768
13 6293245904640
14 126740607526400
15 2633207863038976
16 56330595706808576
17 1238815010325576192
18 27970477203200824320

[1,2,12,108,1208,15536,220832,3390480,55411872,
 954553664,17211258240,323148560768,6293245904640,
 126740607526400,2633207863038976,
 56330595706808576,1238815010325576192,
 27970477203200824320]

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Last modified August 21 19:04 EDT 2019. Contains 326168 sequences. (Running on oeis4.)