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A067994 as a simple table

na(n)
01
10
2-2
30
412
50
6-120
70
81680
90
10-30240
110
12665280
130
14-17297280
150
16518918400
170
18-17643225600
190
20670442572800
210
22-28158588057600
230
241295295050649600
250
26-64764752532480000
270
283497296636753920000
290
30-202843204931727360000
310

[1,0,-2,0,12,0,-120,0,1680,0,-30240,0,665280,0,
 -17297280,0,518918400,0,-17643225600,0,
 670442572800,0,-28158588057600,0,1295295050649600,
 0,-64764752532480000,0,3497296636753920000,0,
 -202843204931727360000,0]