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A177594 as a simple table

na(n)
01
11
26
390
42520
5113400
67484400
7681040081
881715496353
912500505087678
102374643401938450
11548423992273068450
12151329242873227786290
1349169594830177508466780
1418581179389079670034395725
158080585890092465008705929001
164006831811683726939901512184106

[1,1,6,90,2520,113400,7484400,681040081,
 81715496353,12500505087678,2374643401938450,
 548423992273068450,151329242873227786290,
 49169594830177508466780,
 18581179389079670034395725,
 8080585890092465008705929001,
 4006831811683726939901512184106]