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A103872 as a simple table

n a(n)
0 0
1 2
2 2
3 6
4 12
5 30
6 72
7 182
8 464
9 1206
10 3170
11 8426
12 22596
13 61074
14 166194
15 454950
16 1251984
17 3461574
18 9611190
19 26787378
20 74916660
21 210178458
22 591347988
23 1668172842
24 4717282752
25 13369522250
26 37970114702
27 108045430902

[0,2,2,6,12,30,72,182,464,1206,3170,8426,22596,
 61074,166194,454950,1251984,3461574,9611190,
 26787378,74916660,210178458,591347988,1668172842,
 4717282752,13369522250,37970114702,108045430902]

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Last modified April 16 01:40 EDT 2024. Contains 371696 sequences. (Running on oeis4.)