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A229474 as a simple table

n a(n)
1 2
2 42
3 420
4 3328
5 23964
6 163528
7 1077588
8 6927888
9 43728652
10 272112472
11 1674170052
12 10205294240
13 61731029116
14 370982129640
15 2217078993972
16 13186003918640
17 78093132909036
18 460783597042808
19 2709856102785444

[2,42,420,3328,23964,163528,1077588,6927888,
 43728652,272112472,1674170052,10205294240,
 61731029116,370982129640,2217078993972,
 13186003918640,78093132909036,460783597042808,
 2709856102785444]

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Last modified September 25 20:01 EDT 2021. Contains 347659 sequences. (Running on oeis4.)