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A030625 as a simple table

n a(n)
0 0
1 2
2 6
3 12
4 24
5 40
6 72
7 126
8 240
9 459
10 940
11 1936
12 4104
13 8671
14 18508
15 39300
16 83616
17 177055
18 374652
19 789811
20 1662400
21 3488877
22 7309588
23 15279406
24 31886928
25 66422275
26 138157708
27 286924599
28 595102144
29 1232672869

[0,2,6,12,24,40,72,126,240,459,940,1936,4104,8671,
 18508,39300,83616,177055,374652,789811,1662400,
 3488877,7309588,15279406,31886928,66422275,
 138157708,286924599,595102144,1232672869]

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Last modified April 16 05:35 EDT 2024. Contains 371697 sequences. (Running on oeis4.)