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A220681 as a simple table

na(n)
11
21
31
41
54
61
71
89
99
101
111
1225
1343
1425
151
161
1764
18201
19201
2064
211
221
23169
24968
252024
26968
27169
281
291
30441
314604
3221380
3321380
344604
35441
361
371
381156
3922000
40220299
41468036
42220299
4322000
441156
451
461
473025
48104976
492316754
509973284
519973284
522316754

[1,1,1,1,4,1,1,9,9,1,1,25,43,25,1,1,64,201,201,64,
 1,1,169,968,2024,968,169,1,1,441,4604,21380,21380,
 4604,441,1,1,1156,22000,220299,468036,220299,
 22000,1156,1,1,3025,104976,2316754,9973284,
 9973284,2316754]