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A124713 as a simple table

n a(n)
0 1
1 20
2 58
3 134
4 358
5 950
6 2596
7 7160
8 19966
9 56078
10 158488
11 450140
12 1283848
13 3674600
14 10549282
15 30365294
16 87605806
17 253263470
18 733498744
19 2127803180
20 6181574548
21 17982188708
22 52373316262
23 152706201170
24 445700295760

[1,20,58,134,358,950,2596,7160,19966,56078,158488,
 450140,1283848,3674600,10549282,30365294,87605806,
 253263470,733498744,2127803180,6181574548,
 17982188708,52373316262,152706201170,445700295760]

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Last modified October 6 18:21 EDT 2022. Contains 357270 sequences. (Running on oeis4.)