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A129383 as a simple table

n a(n)
0 1
1 0
2 2
3 2
4 6
5 8
6 20
7 32
8 70
9 120
10 252
11 452
12 924
13 1696
14 3432
15 6400
16 12870
17 24240
18 48620
19 92252
20 184756
21 352464
22 705432
23 1351616
24 2704156
25 5199376
26 10400600
27 20056584
28 40116600
29 77555328
30 155117520
31 300533760
32 601080390
33 1166790240

[1,0,2,2,6,8,20,32,70,120,252,452,924,1696,3432,
 6400,12870,24240,48620,92252,184756,352464,705432,
 1351616,2704156,5199376,10400600,20056584,
 40116600,77555328,155117520,300533760,601080390,
 1166790240]

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Last modified September 15 18:36 EDT 2024. Contains 375954 sequences. (Running on oeis4.)