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A024284 as a simple table

na(n)
00
11
2-8
3144
4-4960
5270592
6-21137408
72224725888
8-302627860480
951593676611584
10-10764002330353664
112695943436451381248
12-797890777835475828736
13275364493447731494551552
14-109570026970391274539712512
1549780238650264282725443174400

[0,1,-8,144,-4960,270592,-21137408,2224725888,
 -302627860480,51593676611584,-10764002330353664,
 2695943436451381248,-797890777835475828736,
 275364493447731494551552,
 -109570026970391274539712512,
 49780238650264282725443174400]