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A115082 as a simple table

n a(n)
0 1
1 2
2 5
3 20
4 94
5 507
6 3009
7 19350
8 132920
9 966962
10 7396366
11 59173897
12 492995320
13 4262193275
14 38125138575
15 351960913470
16 3346157796060
17 32700768584100
18 327957494280000
19 3370522049859990
20 35451669429671520
21 381183654441916290

[1,2,5,20,94,507,3009,19350,132920,966962,7396366,
 59173897,492995320,4262193275,38125138575,
 351960913470,3346157796060,32700768584100,
 327957494280000,3370522049859990,
 35451669429671520,381183654441916290]

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Last modified September 28 10:48 EDT 2021. Contains 347714 sequences. (Running on oeis4.)