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A002273 as a simple table

na(n)
01
10
298280
319138560
4805208040
514651449344
6156717687840
71162883174400
86596666916840
930507984568320
10119992701299184
11414348381296640
121283840894706720
133635166831206400
149523995863722560

[1,0,98280,19138560,805208040,14651449344,
 156717687840,1162883174400,6596666916840,
 30507984568320,119992701299184,414348381296640,
 1283840894706720,3635166831206400,
 9523995863722560]