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A121989 as a simple table

n a(n)
0 1
1 1
2 1
3 2
4 3
5 8
6 10
7 36
8 21
9 216
10 -126
11 1960
12 -3751
13 25044
14 -74230
15 403144
16 -1489095
17 7638000
18 -32168046
19 164287728
20 -756314855
21 3929115500
22 -19332654222
23 103079467832
24 -535020703583
25 2937890929320
26 -15952504285350
27 90295702455504
28 -510040670796063
29 2974949788743940

[1,1,1,2,3,8,10,36,21,216,-126,1960,-3751,25044,
 -74230,403144,-1489095,7638000,-32168046,
 164287728,-756314855,3929115500,-19332654222,
 103079467832,-535020703583,2937890929320,
 -15952504285350,90295702455504,-510040670796063,
 2974949788743940]

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)