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A013333 as a simple table

na(n)
00
11
20
32
4-4
512
6-120
7128
8-4464
96912
10-206880
11776800
12-12788224
1395713984
14-1101528064
1513091780224
16-133871961344
172061579919104
18-22144979338752
19381671021731840
20-4690276122840064
2183860033272100864

[0,1,0,2,-4,12,-120,128,-4464,6912,-206880,776800,
 -12788224,95713984,-1101528064,13091780224,
 -133871961344,2061579919104,-22144979338752,
 381671021731840,-4690276122840064,
 83860033272100864]