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A134827 as a simple table

n a(n)
1 1
2 2
3 8
4 18
5 78
6 206
7 872
8 2226
9 10820
10 26558
11 129248
12 335886
13 1630174
14 3990978
15 21778450
16 48749804
17 274937594
18 650637382
19 3598954596
20 7610277626
21 49741540498
22 93757794966
23 639655810986
24 1233712869392
25 8530089042832

[1,2,8,18,78,206,872,2226,10820,26558,129248,
 335886,1630174,3990978,21778450,48749804,
 274937594,650637382,3598954596,7610277626,
 49741540498,93757794966,639655810986,
 1233712869392,8530089042832]

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Last modified October 28 17:59 EDT 2021. Contains 348329 sequences. (Running on oeis4.)