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A248837 as a simple table

n a(n)
1 2
2 6
3 24
4 118
5 686
6 4598
7 34872
8 295044
9 2753958
10 28103804
11 311216626
12 3716341042
13 47597786154
14 650812077852
15 9461423560788
16 145724617925326
17 2370293673319292
18 40600119927220706
19 730458115445479734
20 13772063820971722638

[2,6,24,118,686,4598,34872,295044,2753958,
 28103804,311216626,3716341042,47597786154,
 650812077852,9461423560788,145724617925326,
 2370293673319292,40600119927220706,
 730458115445479734,13772063820971722638]

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Last modified January 27 03:13 EST 2023. Contains 359836 sequences. (Running on oeis4.)