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A295496 as a simple table

na(n)
14
212
356
4216
51240
65040
731992
8139968
9828576
103720000
1125238048
12104509440
13803499840
143687014016
1524373440000
16110630707200
17790546192128
183463116249600
1925522921047520
20108957312000000
21816244048599840
223924124012353600
2326682733370563200

[4,12,56,216,1240,5040,31992,139968,828576,
 3720000,25238048,104509440,803499840,3687014016,
 24373440000,110630707200,790546192128,
 3463116249600,25522921047520,108957312000000,
 816244048599840,3924124012353600,
 26682733370563200]