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A173504 as a simple table

na(n)
01
11
21
31
42
51
61
716
816
91
101
11416
123328
13416
141
151
1633280
176922240
186922240
1933280
201
211
228053760
23134014566400
243484378726400
25134014566400
268053760
271
281
295863137280
3023610150250086400
3149109112520179712000
3249109112520179712000
3323610150250086400
345863137280
351

[1,1,1,1,2,1,1,16,16,1,1,416,3328,416,1,1,33280,
 6922240,6922240,33280,1,1,8053760,134014566400,
 3484378726400,134014566400,8053760,1,1,5863137280,
 23610150250086400,49109112520179712000,
 49109112520179712000,23610150250086400,5863137280,
 1]