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A013447 as a simple table

na(n)
01
10
20
3160
4-1792
5484224
6-15071232
76570936320
8-461050544128
9285431558799360
10-41198126773469184
1131834693166688370688
12-8575650915562515595264
137808988993818084822220800

[1,0,0,160,-1792,484224,-15071232,6570936320,
 -461050544128,285431558799360,-41198126773469184,
 31834693166688370688,-8575650915562515595264,
 7808988993818084822220800]