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A321573 as a simple table

n a(n)
0 1
1 2
2 8
3 22
4 68
5 202
6 608
7 1822
8 5468
9 16402
10 49208
11 147622
12 442868
13 1328602
14 3985808
15 11957422
16 35872268
17 107616802
18 322850408
19 968551222
20 2905653668
21 8716961002
22 26150883008
23 78452649022
24 235357947068
25 706073841202
26 2118221523608
27 6354664570822
28 19063993712468

[1,2,8,22,68,202,608,1822,5468,16402,49208,147622,
 442868,1328602,3985808,11957422,35872268,
 107616802,322850408,968551222,2905653668,
 8716961002,26150883008,78452649022,235357947068,
 706073841202,2118221523608,6354664570822,
 19063993712468]

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Last modified September 28 04:28 EDT 2022. Contains 357063 sequences. (Running on oeis4.)