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A121594 as a simple table

na(n)
115
228
375
477
5104
6187
7196
8203
9210
10222
11228
12235
13238
14328
15345
16375
17551
18620
19847
20888
211036
221107
231204
241349
251352
261372
271391
281430
291457
301469
311470
321498
331666
341687
351855
361875
372133
382301
392425
402440
412556
422678
432948
443179
453337
463477

[15,28,75,77,104,187,196,203,210,222,228,235,238,
 328,345,375,551,620,847,888,1036,1107,1204,1349,
 1352,1372,1391,1430,1457,1469,1470,1498,1666,1687,
 1855,1875,2133,2301,2425,2440,2556,2678,2948,3179,
 3337,3477]