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A086591 as a simple table

na(n)
01
11
21
31
42
56
624
72520
818378360
96906955255200
105987137029832314231356979603166508647200
111000156941827668764767034398758639477404906113721462819980559968765060862592344000

[1,1,1,1,2,6,24,2520,18378360,6906955255200,
 5987137029832314231356979603166508647200,
 10001569418276687647670343987586394774049061137214\
 62819980559968765060862592344000]