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A228427 as a simple table

na(n)
11
21
332
4279936
55159780352
636279705600000000000
743535646720000000000000
8248025792814017858404352000000000000000
917203888069958467671501449252044800000000000000000

[1,1,32,279936,5159780352,36279705600000000000,
 43535646720000000000000,
 248025792814017858404352000000000000000,
 17203888069958467671501449252044800000000000000000\
 ]