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A111921 as a simple table

na(n)
11
216
3432
46912
5864000
6864000
7296352000
84741632000
9128024064000
10128024064000
11170400029184000
12170400029184000
13374368864117248000
14374368864117248000
1514974754564689920
16239596073035038720

[1,16,432,6912,864000,864000,296352000,4741632000,
 128024064000,128024064000,170400029184000,
 170400029184000,374368864117248000,
 374368864117248000,14974754564689920,
 239596073035038720]