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A354275 as a simple table

na(n)
11
20
3-2
48
5-16
6-64
7-832
813824
98192
10-36096
11-4228608
12-58438656
13-398991360
14-3452915712
1544581613568
167144463302656
17-17762113880064
18126440605483008
19-7331825098948608
20-88237584523984896
213154526750647517184
22-27279757707305287680
23-1278044473427380666368

[1,0,-2,8,-16,-64,-832,13824,8192,-36096,-4228608,
 -58438656,-398991360,-3452915712,44581613568,
 7144463302656,-17762113880064,126440605483008,
 -7331825098948608,-88237584523984896,
 3154526750647517184,-27279757707305287680,
 -1278044473427380666368]