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A242651 as a simple table

na(n)
00
1-1
23
3-10
440
5-190
61050
7-6620
846800
9-365300
103103100
11-28269800
12271627200
13-2691559000
1426495469000
15-238131478000
161394099824000
1715194495654000
18-936096296850000
1929697351895900000
20-819329864480400000
2121683886333440500000
22-570263312237604700000
2315145164178973569000000

[0,-1,3,-10,40,-190,1050,-6620,46800,-365300,
 3103100,-28269800,271627200,-2691559000,
 26495469000,-238131478000,1394099824000,
 15194495654000,-936096296850000,29697351895900000,
 -819329864480400000,21683886333440500000,
 -570263312237604700000,15145164178973569000000]