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A009077 as a simple table

na(n)
01
10
20
30
4-12
560
6-570
73780
8-33600
9266112
10-2452200
1121323280
12-195333336
131587135264
14-9944442144
15-30963922080
163059476293120
17-90038301262976
182195425718875200
19-50367095018001792
201140534839454383488

[1,0,0,0,-12,60,-570,3780,-33600,266112,-2452200,
 21323280,-195333336,1587135264,-9944442144,
 -30963922080,3059476293120,-90038301262976,
 2195425718875200,-50367095018001792,
 1140534839454383488]