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A319306 as a simple table

na(n)
-41
-30
-2-232
-10
086064
1-1835008
223619232
3-229638144
41841202076
5-12765888512
678856617456
7-442924793856
82295931514240
9-11106754756608
1050583249259456
11-218397947199488
12899050944837546
13-3545383150551040
1413446464974112552
15-49213617532305408

[1,0,-232,0,86064,-1835008,23619232,-229638144,
 1841202076,-12765888512,78856617456,-442924793856,
 2295931514240,-11106754756608,50583249259456,
 -218397947199488,899050944837546,
 -3545383150551040,13446464974112552,
 -49213617532305408]