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A161698 as a simple table

na(n)
01
15
214
330
454
586
6125
7169
8215
9259
10297
11325
12340
13340
14325
15297
16259
17215
18169
19125
2086
2154
2230
2314
245
251

[1,5,14,30,54,86,125,169,215,259,297,325,340,340,
 325,297,259,215,169,125,86,54,30,14,5,1]