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A004358 as a simple table

na(n)
31
424
5435
67140
7111930
81712304
925827165
10386206920
115743572120
1285113005120
131258315963905
1418574174153080
15273897571557780
164036320536972640
1759458448728028700
18875691012480893280

[1,24,435,7140,111930,1712304,25827165,386206920,
 5743572120,85113005120,1258315963905,
 18574174153080,273897571557780,4036320536972640,
 59458448728028700,875691012480893280]