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A126859 as a simple table

n a(n)
0 0
1 0
2 1
3 20
4 102
5 2288
6 3773
7 14232
8 133616
9 119904
10 584517
11 1927900
12 4013432
13 2569296
14 14394518
15 8365192
16 14426496
17 23381600
18 151885575
19 58125708
20 269849564
21 395149888
22 195967551
23 828880856
24 398774464
25 544543680
26 4586626939
27 1018905048
28 1396485648

[0,0,1,20,102,2288,3773,14232,133616,119904,
 584517,1927900,4013432,2569296,14394518,8365192,
 14426496,23381600,151885575,58125708,269849564,
 395149888,195967551,828880856,398774464,544543680,
 4586626939,1018905048,1396485648]

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Last modified August 5 22:11 EDT 2020. Contains 336214 sequences. (Running on oeis4.)