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A009212 as a simple table

n a(n)
0 1
1 1
2 3
3 9
4 33
5 137
6 619
7 3017
8 15617
9 84625
10 474771
11 2723721
12 15730209
13 89487257
14 482793211
15 2259370697
16 6292321025
17 -41172399839
18 -1066104760797
19 -14517156416247
20 -163539106749663
21 -1652237279663959
22 -15169567281615221

[1,1,3,9,33,137,619,3017,15617,84625,474771,
 2723721,15730209,89487257,482793211,2259370697,
 6292321025,-41172399839,-1066104760797,
 -14517156416247,-163539106749663,
 -1652237279663959,-15169567281615221]

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Last modified April 18 13:48 EDT 2024. Contains 371780 sequences. (Running on oeis4.)