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A084903 as a simple table

n a(n)
0 1
1 9
2 44
3 170
4 576
5 1792
6 5248
7 14688
8 39680
9 104192
10 267264
11 672256
12 1662976
13 4055040
14 9764864
15 23257088
16 54853632
17 128253952
18 297533440
19 685375488
20 1568669696
21 3569352704
22 8078229504
23 18192793600
24 40785412096
25 91049951232

[1,9,44,170,576,1792,5248,14688,39680,104192,
 267264,672256,1662976,4055040,9764864,23257088,
 54853632,128253952,297533440,685375488,1568669696,
 3569352704,8078229504,18192793600,40785412096,
 91049951232]

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Last modified May 8 12:57 EDT 2021. Contains 343666 sequences. (Running on oeis4.)