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A219539 as a simple table

na(n)
51
61
71
81
92
103
112
121
131
144
1511
1619
1723
1819
1911
204
211
221
235
2417
2538
2661
2771
2861
2938
3017
315
321
331
347
3533
36107
37257
38471
39673
40757
41673
42471
43257
44107
4533
467
471
481
498
5043
51161
52451
53977
541675
552303
562559
572303
581675
59977
60451
61161
6243
638
641

[1,1,1,1,2,3,2,1,1,4,11,19,23,19,11,4,1,1,5,17,38,
 61,71,61,38,17,5,1,1,7,33,107,257,471,673,757,673,
 471,257,107,33,7,1,1,8,43,161,451,977,1675,2303,
 2559,2303,1675,977,451,161,43,8,1]