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A015509 as a simple table

na(n)
11
21
310
4740
5433640
62030302480
776034827876000
822779578222682344000
954596862986901017252624000
101046838176230046602563156976288000
11160576277008444677145920980328106246720000

[1,1,10,740,433640,2030302480,76034827876000,
 22779578222682344000,54596862986901017252624000,
 1046838176230046602563156976288000,
 160576277008444677145920980328106246720000]