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A289348 as a simple table

na(n)
01
1-420
2-31500
3-4724160
4-1314429900
5-440028142344
6-162555920654400
7-63990327056960640
8-26341675849615282380
9-11210298679649742846180
10-4895195936831699458605912
11-2181913188022929464292248640

[1,-420,-31500,-4724160,-1314429900,-440028142344,
 -162555920654400,-63990327056960640,
 -26341675849615282380,-11210298679649742846180,
 -4895195936831699458605912,
 -2181913188022929464292248640]