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A009764 as a simple table

n a(n)
0 0
1 2
2 16
3 272
4 7936
5 353792
6 22368256
7 1903757312
8 209865342976
9 29088885112832
10 4951498053124096
11 1015423886506852352
12 246921480190207983616
13 70251601603943959887872
14 23119184187809597841473536
15 8713962757125169296170811392
16 3729407703720529571097509625856

[0,2,16,272,7936,353792,22368256,1903757312,
 209865342976,29088885112832,4951498053124096,
 1015423886506852352,246921480190207983616,
 70251601603943959887872,
 23119184187809597841473536,
 8713962757125169296170811392,
 3729407703720529571097509625856]

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Last modified October 20 12:34 EDT 2018. Contains 316379 sequences. (Running on oeis4.)