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A180281 as a simple table

na(n)
11
21
32
41
56
63
71
818
912
104
111
1250
1350
1420
155
161
17140
18195
1990
2030
216
221
23392
24735
25392
26147
2742
287
291
301106
312716
321652
33672
34224
3556
368
371
383138
399912
406804
412970
421080
43324
4472
459
461
478952
4835850
4927600
5012825
514950
521650
53450
5490
5510
561
5725652
58128865
59110715
6054450
6122022
627865
632420
64605
65110
6611

[1,1,2,1,6,3,1,18,12,4,1,50,50,20,5,1,140,195,90,
 30,6,1,392,735,392,147,42,7,1,1106,2716,1652,672,
 224,56,8,1,3138,9912,6804,2970,1080,324,72,9,1,
 8952,35850,27600,12825,4950,1650,450,90,10,1,
 25652,128865,110715,54450,22022,7865,2420,605,110,
 11]