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A263877 as a simple table

na(n)
121
243
357
472
599
6111
7117
8119
9128
10132
11142
12172
13174
14185
15192
16193
17200
18211
19212
20216
21251
22268
23294
24305
25322
26336
27338
28342
29351
30360
31378
32394
33408
34418
35431
36443
37448
38450
39460
40485
41498
42509
43515
44524
45552
46560
47562
48568
49580
50601
51606
52612
53616

[21,43,57,72,99,111,117,119,128,132,142,172,174,
 185,192,193,200,211,212,216,251,268,294,305,322,
 336,338,342,351,360,378,394,408,418,431,443,448,
 450,460,485,498,509,515,524,552,560,562,568,580,
 601,606,612,616]