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A213151 as a simple table

na(n)
01
1-7
2-14
3854
47000
5-405832
6-7373744
7396878384
813211201920
9-640085041792
10-35826474785024
111495566369860864
12136414677606538240
13-4577281372443415552
14-691769416923579029504
1516372660554702059116544

[1,-7,-14,854,7000,-405832,-7373744,396878384,
 13211201920,-640085041792,-35826474785024,
 1495566369860864,136414677606538240,
 -4577281372443415552,-691769416923579029504,
 16372660554702059116544]