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A104254 as a simple table

na(n)
13
2-2
351
4136
53845
641616
7863863
816414336
9391049289
109960083200
11285790672211
128909873427456
13302962284883453
1411110699151190016
15437914813170747375
1618446388386281455616
17827246664260042492177

[3,-2,51,136,3845,41616,863863,16414336,391049289,
 9960083200,285790672211,8909873427456,
 302962284883453,11110699151190016,
 437914813170747375,18446388386281455616,
 827246664260042492177]