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A000805 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 24
5 120
6 720
7 1854
8 4738
9 12072
10 30818
11 79118
12 204448
13 528950
14 1370674
15 3557408
16 9244418
17 24043990
18 62573616
19 162925614
20 424377730
21 1105703640
22 2881483458
23 7510389278
24 19577689120
25 51038756326
26 133066443346
27 346944079632
28 904622495746
29 2358783572710
30 6150613767440
31 16038217209886

[1,1,2,6,24,120,720,1854,4738,12072,30818,79118,
 204448,528950,1370674,3557408,9244418,24043990,
 62573616,162925614,424377730,1105703640,
 2881483458,7510389278,19577689120,51038756326,
 133066443346,346944079632,904622495746,
 2358783572710,6150613767440,16038217209886]

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Last modified April 24 16:49 EDT 2024. Contains 371962 sequences. (Running on oeis4.)