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A126407 as a simple table

n a(n)
0 1
1 20
2 94
3 450
4 2168
5 10486
6 50848
7 247024
8 1201730
9 5852530
10 28526860
11 139144760
12 679090456
13 3315836420
14 16196773236
15 79141717426
16 386812618952
17 1891013450430
18 9246370600422
19 45218609940844
20 221167392509842

[1,20,94,450,2168,10486,50848,247024,1201730,
 5852530,28526860,139144760,679090456,3315836420,
 16196773236,79141717426,386812618952,
 1891013450430,9246370600422,45218609940844,
 221167392509842]

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Last modified September 19 13:01 EDT 2020. Contains 337178 sequences. (Running on oeis4.)