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A012825 as a simple table

na(n)
01
10
28
3-392
420096
5-1754368
6241340032
7-44833033216
810840711614464
9-3348758074142720
101285112610745352192
11-598690046386495291392
12332953969072425739124736
13-217949438999618554495500288

[1,0,8,-392,20096,-1754368,241340032,-44833033216,
 10840711614464,-3348758074142720,
 1285112610745352192,-598690046386495291392,
 332953969072425739124736,
 -217949438999618554495500288]