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A199400 as a simple table

na(n)
01
12
22
34
410
56
68
738
854
924
1016
11130
12330
13336
14120
1532
16422
171710
183000
192400
20720
2164
221330
238106
2421840
2529400
2619440
275040
28128
294118
3036414
31141624
32285600
33312480
34176400
3540320
36256
3712610
38158010
39853776
402421720
413900960
423598560
431774080
44362880

[1,2,2,4,10,6,8,38,54,24,16,130,330,336,120,32,
 422,1710,3000,2400,720,64,1330,8106,21840,29400,
 19440,5040,128,4118,36414,141624,285600,312480,
 176400,40320,256,12610,158010,853776,2421720,
 3900960,3598560,1774080,362880]