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A279618 as a simple table

na(n)
11
2-9
330
4-15
5-240
6978
7-1463
8-2361
918201
10-42800
1115624
12227742
13-809028
141088367
151593120
16-11383551
1725003158
18-8589729
19-119069358
20403991280
21-521730930
22-736063496
235088063696
24-10843708302
253624181875
2648991048836
27-162420646812
28205328313785
29284014016994

[1,-9,30,-15,-240,978,-1463,-2361,18201,-42800,
 15624,227742,-809028,1088367,1593120,-11383551,
 25003158,-8589729,-119069358,403991280,-521730930,
 -736063496,5088063696,-10843708302,3624181875,
 48991048836,-162420646812,205328313785,
 284014016994]