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A000902 as a simple table

n a(n)
0 1
1 1
2 3
3 10
4 38
5 156
6 692
7 3256
8 16200
9 84496
10 460592
11 2611104
12 15355232
13 93376960
14 585989952
15 3786534784
16 25152768128
17 171474649344
18 1198143415040
19 8569374206464
20 62668198184448
21 468111364627456
22 3568287053001728

[1,1,3,10,38,156,692,3256,16200,84496,460592,
 2611104,15355232,93376960,585989952,3786534784,
 25152768128,171474649344,1198143415040,
 8569374206464,62668198184448,468111364627456,
 3568287053001728]

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Last modified May 13 23:15 EDT 2024. Contains 372524 sequences. (Running on oeis4.)