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A157531 as a simple table

na(n)
02
13
23
37
410
57
621
729
829
921
1071
1186
12106
1386
1471
15253
16277
17352
18352
19277
20253
21925
22960
231149
241324
251149
26960
27925
283433
293481
303873
314657
324657
333873
343481
353433
3612871
3712934
3813654
3916006
4017770
4116006
4213654
4312934
4412871
4548621
4648701
4749916
4855676
4964496
5064496
5155676
5249916
5348701
5448621

[2,3,3,7,10,7,21,29,29,21,71,86,106,86,71,253,277,
 352,352,277,253,925,960,1149,1324,1149,960,925,
 3433,3481,3873,4657,4657,3873,3481,3433,12871,
 12934,13654,16006,17770,16006,13654,12934,12871,
 48621,48701,49916,55676,64496,64496,55676,49916,
 48701,48621]