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A060540 as a simple table

na(n)
11
21
31
41
53
61
71
810
915
101
111
1235
13280
14105
151
161
17126
185775
1915400
20945
211
221
23462
24126126
252627625
261401400
2710395
281
291
301716
312858856
32488864376
332546168625
34190590400
35135135
361
371
386435
3966512160
4096197645544
415194672859376
424509264634875
4336212176000
442027025
451

[1,1,1,1,3,1,1,10,15,1,1,35,280,105,1,1,126,5775,
 15400,945,1,1,462,126126,2627625,1401400,10395,1,
 1,1716,2858856,488864376,2546168625,190590400,
 135135,1,1,6435,66512160,96197645544,
 5194672859376,4509264634875,36212176000,2027025,1]