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A074599 as a simple table

n a(n)
1 2
2 8
3 46
4 352
5 1126
6 13016
7 176138
8 182144
9 3186538
10 62075752
11 63461422
12 1488711776
13 7577414602
14 23104065256
15 680057071574
16 21372905414144
17 21646396991594
18 21904260478904
19 819482859775298
20 828045249930848

[2,8,46,352,1126,13016,176138,182144,3186538,
 62075752,63461422,1488711776,7577414602,
 23104065256,680057071574,21372905414144,
 21646396991594,21904260478904,819482859775298,
 828045249930848]

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Last modified December 6 14:49 EST 2016. Contains 278781 sequences.