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A022721 as a simple table

n a(n)
0 1
1 -29
2 377
3 -2900
4 14877
5 -56666
6 189109
7 -649339
8 2219834
9 -6777677
10 19041980
11 -54885893
12 159810358
13 -432662339
14 1117635553
15 -2957018205
16 7799355410
17 -19555103564
18 48073453671
19 -119774561120
20 294567447945

[1,-29,377,-2900,14877,-56666,189109,-649339,
 2219834,-6777677,19041980,-54885893,159810358,
 -432662339,1117635553,-2957018205,7799355410,
 -19555103564,48073453671,-119774561120,
 294567447945]

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Last modified May 20 10:33 EDT 2022. Contains 353871 sequences. (Running on oeis4.)