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A007100 as a simple table

na(n)
21
370
416800
59238320
69520156800
716305064776000
842856575521760000
9163329351308323200000
10864876880105205071104000
116155146233167046820024320000
1257316399761348433188962519040000

[1,70,16800,9238320,9520156800,16305064776000,
 42856575521760000,163329351308323200000,
 864876880105205071104000,
 6155146233167046820024320000,
 57316399761348433188962519040000]