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A171069 as a simple table

n a(n)
0 0
1 1
2 1
3 12
4 25
5 169
6 480
7 2521
8 8425
9 38988
10 142129
11 615889
12 2352000
13 9845809
14 38543569
15 158429388
16 628446025
17 2558296441
18 10219534560
19 41389108489
20 165953373625
21 670283913612
22 2692893971041
23 10860865199521
24 43679923392000

[0,1,1,12,25,169,480,2521,8425,38988,142129,
 615889,2352000,9845809,38543569,158429388,
 628446025,2558296441,10219534560,41389108489,
 165953373625,670283913612,2692893971041,
 10860865199521,43679923392000]

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Last modified May 21 17:17 EDT 2019. Contains 323444 sequences. (Running on oeis4.)