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A273350 as a simple table

na(n)
21
31
41
51
63
71
81
96
105
111
121
1310
1416
157
161
171
1815
1940
2031
219
221
231
2421
2585
26105
2751
2811
291
301
3128
32161
33295
34219
3576
3613
371
381
3936
40280
41721
42771
43396
44106
4515
461
471
4845
49456
501582
512331
521681
53650
54141
5517
561
571
5855
59705
603186
616244
626083
633235
64995
65181
6619
671

[1,1,1,1,3,1,1,6,5,1,1,10,16,7,1,1,15,40,31,9,1,1,
 21,85,105,51,11,1,1,28,161,295,219,76,13,1,1,36,
 280,721,771,396,106,15,1,1,45,456,1582,2331,1681,
 650,141,17,1,1,55,705,3186,6244,6083,3235,995,181,
 19,1]