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A104014 as a simple table

na(n)
10
20
32
40
512
62
74
80
956
1012
11744
122
132520
144
158
160
17240
1856
19220752
2012
2148
22744
231424
242
25671088
262520
27155344
284
29148102320
308
3116
320
33992
34240
353744
3656
3759433060960
38220752
393360
4012
41818400
4248
4312192
44744
452912
461424
475711392
482
491369568
50671088
51160

[0,0,2,0,12,2,4,0,56,12,744,2,2520,4,8,0,240,56,
 220752,12,48,744,1424,2,671088,2520,155344,4,
 148102320,8,16,0,992,240,3744,56,59433060960,
 220752,3360,12,818400,48,12192,744,2912,1424,
 5711392,2,1369568,671088,160]