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A053498 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 16
5 56
6 256
7 1072
8 11264
9 78976
10 672256
11 4653056
12 49810432
13 433429504
14 4448608256
15 39221579776
16 607251736576
17 7244686764032
18 101611422797824
19 1170362064019456
20 19281174853615616
21 261583327556386816
22 4084459360167657472
23 54366023748591386624

[1,1,2,4,16,56,256,1072,11264,78976,672256,
 4653056,49810432,433429504,4448608256,39221579776,
 607251736576,7244686764032,101611422797824,
 1170362064019456,19281174853615616,
 261583327556386816,4084459360167657472,
 54366023748591386624]

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Last modified July 23 14:11 EDT 2019. Contains 325254 sequences. (Running on oeis4.)