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A166190 as a simple table

n a(n)
0 1
1 21
2 207
3 1298
4 6052
5 22824
6 73383
7 208269
8 534687
9 1264026
10 2788834
11 5802288
12 11477240
13 21726484
14 39571482
15 69652946
16 118924069
17 197575191
18 320248137
19 507608530
20 788356140
21 1201765708
22 1800865001
23 2656371783
24 3861528515

[1,21,207,1298,6052,22824,73383,208269,534687,
 1264026,2788834,5802288,11477240,21726484,
 39571482,69652946,118924069,197575191,320248137,
 507608530,788356140,1201765708,1800865001,
 2656371783,3861528515]

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Last modified April 23 15:20 EDT 2024. Contains 371916 sequences. (Running on oeis4.)