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A375224 as a simple table

na(n)
01
12
28
354
4492
55400
668520
7987000
815928080
9284588640
105570994240
11118432147680
122714315123520
1366662973336960
141745585471710080
1548522632817859200
161426443527673964800
1744200671544495065600
181439417651948346470400
1949134301244829555955200

[1,2,8,54,492,5400,68520,987000,15928080,
 284588640,5570994240,118432147680,2714315123520,
 66662973336960,1745585471710080,48522632817859200,
 1426443527673964800,44200671544495065600,
 1439417651948346470400,49134301244829555955200]