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A205220 as a simple table

n a(n)
1 20
2 52
3 132
4 340
5 868
6 2228
7 5700
8 14612
9 37412
10 95860
11 245508
12 628948
13 1610980
14 4126772
15 10570692
16 27077780
17 69360548
18 177671668
19 455113860
20 1165800532
21 2986255972
22 7649458100
23 19594481988
24 50192314388
25 128570242340
26 329339499892

[20,52,132,340,868,2228,5700,14612,37412,95860,
 245508,628948,1610980,4126772,10570692,27077780,
 69360548,177671668,455113860,1165800532,
 2986255972,7649458100,19594481988,50192314388,
 128570242340,329339499892]

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Last modified April 17 20:13 EDT 2024. Contains 371767 sequences. (Running on oeis4.)