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A134857 as a simple table

na(n)
1241920
21048320
310200960
425724160
537255680
693139200
7123963840
8245044800
9588107520
10819786240
111407893760
121871251200
133758169600
145886558720
158553283200
1610783342080
1713470367680
1819769460480
1930791819520
2040446806400

[241920,1048320,10200960,25724160,37255680,
 93139200,123963840,245044800,588107520,819786240,
 1407893760,1871251200,3758169600,5886558720,
 8553283200,10783342080,13470367680,19769460480,
 30791819520,40446806400]