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A005804 as a simple table

n a(n)
1 1
2 2
3 8
4 58
5 612
6 8374
7 140408
8 2785906
9 63830764
10 1658336270
11 48169385024
12 1546832023114
13 54413083601268
14 2080827594898342
15 85948745163598088
16 3813417859420469410
17 180876816831806597500
18 9133309115320844870078
19 489156459621633161274704
20 27696066472039561313329018

[1,2,8,58,612,8374,140408,2785906,63830764,
 1658336270,48169385024,1546832023114,
 54413083601268,2080827594898342,85948745163598088,
 3813417859420469410,180876816831806597500,
 9133309115320844870078,489156459621633161274704,
 27696066472039561313329018]

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Last modified March 18 20:16 EDT 2019. Contains 321293 sequences. (Running on oeis4.)