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A115109 as a simple table

n a(n)
0 1
1 2
2 12
3 18
4 62
5 420
6 682
7 5828
8 16852
9 61952
10 201184
11 669920
12 2184064
13 7126784
14 23147776
15 75118592
16 243460096
17 788658176
18 2553683968
19 8267055104
20 26758955008
21 86606348288
22 280288952320
23 907084169216
24 2935485890560

[1,2,12,18,62,420,682,5828,16852,61952,201184,
 669920,2184064,7126784,23147776,75118592,
 243460096,788658176,2553683968,8267055104,
 26758955008,86606348288,280288952320,907084169216,
 2935485890560]

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Last modified May 29 00:29 EDT 2024. Contains 372921 sequences. (Running on oeis4.)