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A071739 as a simple table

n a(n)
0 1
1 2
2 5
3 15
4 48
5 159
6 539
7 1859
8 6500
9 22984
10 82042
11 295222
12 1069776
13 3900225
14 14296455
15 52656315
16 194777340
17 723281460
18 2695246950
19 10075695330
20 37776123840
21 142010723790
22 535172997294
23 2021412800430
24 7651226309768

[1,2,5,15,48,159,539,1859,6500,22984,82042,295222,
 1069776,3900225,14296455,52656315,194777340,
 723281460,2695246950,10075695330,37776123840,
 142010723790,535172997294,2021412800430,
 7651226309768]

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Last modified January 22 11:40 EST 2022. Contains 350481 sequences. (Running on oeis4.)