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A015819 as a simple table

na(n)
13
26
37
411
515
619
721
823
927
1031
1133
1242
1343
1451
1557
1659
1762
1869
1970
2071
2177
2279
2383
2484
2587
2693
27103
28131
29139
30141
31159
32163
33165
34177
35187
36189
37191
38199
39211
40213
41223
42235
43237
44251
45267
46270
47271
48282
49285
50287
51297
52311
53315
54316
55321
56330
57331

[3,6,7,11,15,19,21,23,27,31,33,42,43,51,57,59,62,
 69,70,71,77,79,83,84,87,93,103,131,139,141,159,
 163,165,177,187,189,191,199,211,213,223,235,237,
 251,267,270,271,282,285,287,297,311,315,316,321,
 330,331]