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A073511 as a simple table

n a(n)
1 1
2 4
3 18
4 125
5 1027
6 8435
7 71564
8 622882
9 5516130
10 49495432
11 448855139
12 4106164356
13 37838546363
14 350849788546
15 3270531245684
16 30628143485953
17 287992070079777
18 2717649138419586
19 25726964404879666
20 244242934202964444
21 2324722877951987037
22 22178433287546997612

[1,4,18,125,1027,8435,71564,622882,5516130,
 49495432,448855139,4106164356,37838546363,
 350849788546,3270531245684,30628143485953,
 287992070079777,2717649138419586,
 25726964404879666,244242934202964444,
 2324722877951987037,22178433287546997612]

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Last modified February 18 02:57 EST 2020. Contains 332006 sequences. (Running on oeis4.)