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A372816 as a simple table

na(n)
11
21
33
41
53
621
71
83
916
10209
111
123
1316
14163
152640
161
173
1816
19125
202142
2140391
221
233
2416
25125
261686
2733961
28726103
291
303
3116
32125
331296
3427629
35626569
3615003009
371
383
3916
40125
411296
4221858
43525594
4413198604
45350382231

[1,1,3,1,3,21,1,3,16,209,1,3,16,163,2640,1,3,16,
 125,2142,40391,1,3,16,125,1686,33961,726103,1,3,
 16,125,1296,27629,626569,15003009,1,3,16,125,1296,
 21858,525594,13198604,350382231]