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A034741 as a simple table

n a(n)
1 1
2 2
3 8
4 24
5 80
6 232
7 728
8 2160
9 6552
10 19600
11 59048
12 176880
13 531440
14 1593592
15 4782880
16 14346720
17 43046720
18 129133368
19 387420488
20 1162241760
21 3486783664
22 10460294152
23 31381059608
24 94142999520
25 282429536400
26 847288078000
27 2541865821768
28 7625595890640
29 22876792454960

[1,2,8,24,80,232,728,2160,6552,19600,59048,176880,
 531440,1593592,4782880,14346720,43046720,
 129133368,387420488,1162241760,3486783664,
 10460294152,31381059608,94142999520,282429536400,
 847288078000,2541865821768,7625595890640,
 22876792454960]

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Last modified January 25 07:38 EST 2020. Contains 331241 sequences. (Running on oeis4.)