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A049647 as a simple table

na(n)
01
11
24
34
47
57
611
711
817
917
1023
1123
1231
1331
1441
1541
1651
1751
1861
1961
2075
2175
2289
2389
24105
25105
26123
27123
28137
29137
30153
31153
32177
33177
34199
35199
36223
37223
38249
39249
40269
41269
42291
43291
44323
45323
46353
47353
48381
49381
50413
51413
52443
53443
54473
55473
56513
57513

[1,1,4,4,7,7,11,11,17,17,23,23,31,31,41,41,51,51,
 61,61,75,75,89,89,105,105,123,123,137,137,153,153,
 177,177,199,199,223,223,249,249,269,269,291,291,
 323,323,353,353,381,381,413,413,443,443,473,473,
 513,513]