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A264412 as a simple table

n a(n)
0 1
1 3
2 -3
3 9
4 -33
5 126
6 -513
7 2214
8 -9876
9 45045
10 -209493
11 990198
12 -4741191
13 22946247
14 -112079214
15 551793303
16 -2735330190
17 13641353118
18 -68394016548
19 344539469889
20 -1743035351958
21 8851923849123
22 -45110440515753
23 230615809867476
24 -1182376529280117
25 6078184963674498
26 -31322206517658453
27 161774639164275552
28 -837290923919381322

[1,3,-3,9,-33,126,-513,2214,-9876,45045,-209493,
 990198,-4741191,22946247,-112079214,551793303,
 -2735330190,13641353118,-68394016548,344539469889,
 -1743035351958,8851923849123,-45110440515753,
 230615809867476,-1182376529280117,
 6078184963674498,-31322206517658453,
 161774639164275552,-837290923919381322]

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Last modified May 31 18:09 EDT 2020. Contains 334748 sequences. (Running on oeis4.)