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A012858 as a simple table

n a(n)
0 1
1 2
2 2
3 4
4 87734
5 310732
6 2631724
7 13785346041608
8 303257395102
9 616840823966644
10 6080390575672283210764
11 207461256206578143748856
12 79209152838572743713996404

[1,2,2,4,87734,310732,2631724,13785346041608,
 303257395102,616840823966644,
 6080390575672283210764,207461256206578143748856,
 79209152838572743713996404]

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Last modified April 17 05:12 EDT 2021. Contains 343059 sequences. (Running on oeis4.)