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A000318 as a simple table

n a(n)
1 4
2 128
3 16384
4 4456448
5 2080374784
6 1483911200768
7 1501108249821184
8 2044143848640217088
9 3605459138582973251584
10 7995891855149741436305408
11 21776918737280678860353961984
12 71454103701490016776039304265728

[4,128,16384,4456448,2080374784,1483911200768,
 1501108249821184,2044143848640217088,
 3605459138582973251584,7995891855149741436305408,
 21776918737280678860353961984,
 71454103701490016776039304265728]

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Last modified April 23 07:37 EDT 2021. Contains 343201 sequences. (Running on oeis4.)