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A218655 as a simple table

n a(n)
0 2
1 4
2 13
3 -176
4 -786
5 -3452
6 54483
7 237722
8 1037569
9 -16329149
10 -71279530
11 -311145495
12 4897036897
13 21376227709
14 93310132523
15 -1468582101731
16 -6410560285891
17 -27982966049682
18 440416091468393
19 1922476035761802
20 8391868916275609

[2,4,13,-176,-786,-3452,54483,237722,1037569,
 -16329149,-71279530,-311145495,4897036897,
 21376227709,93310132523,-1468582101731,
 -6410560285891,-27982966049682,440416091468393,
 1922476035761802,8391868916275609]

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Last modified April 25 11:39 EDT 2024. Contains 371969 sequences. (Running on oeis4.)