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A186406 as a simple table

na(n)
15
27
39
420
527
635
782
8147
9179
10277
11286
12514
13556
14694
15709
16796
17810
181158
191363
201416
212033
222173
232232
242297
252660
263054
273274
284508
294996
306635
318194
328237
3311047
3411467
3512303
3616166
3719543
3819882
3919936

[5,7,9,20,27,35,82,147,179,277,286,514,556,694,
 709,796,810,1158,1363,1416,2033,2173,2232,2297,
 2660,3054,3274,4508,4996,6635,8194,8237,11047,
 11467,12303,16166,19543,19882,19936]