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A131404 as a simple table

na(n)
01
11
21
31
45
51
61
77
87
91
101
1111
1213
1311
141
151
1613
1727
1827
1913
201
211
2217
2339
2465
2539
2617
271
281
2919
3061
31111
32111
3361
3419
351
361
3723
3879
39193
40221
41193
4279
4323
441
451
4625
47109
48283
49433
50433
51283
52109
5325
541
551
5629
57133
58425
59715
60925
61715
62425
63133
6429
651

[1,1,1,1,5,1,1,7,7,1,1,11,13,11,1,1,13,27,27,13,1,
 1,17,39,65,39,17,1,1,19,61,111,111,61,19,1,1,23,
 79,193,221,193,79,23,1,1,25,109,283,433,433,283,
 109,25,1,1,29,133,425,715,925,715,425,133,29,1]