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A223255 as a simple table

na(n)
15
212
312
432
552
632
780
8236
9236
1080
11208
121076
132172
141076
15208
16528
174908
1817828
1917828
204908
21528
221360
2322388
24166892
25307144
26166892
2722388
281360
293472
30102124
311382228
325359892
335359892
341382228
35102124
363472
378912
38465844
3912894316

[5,12,12,32,52,32,80,236,236,80,208,1076,2172,
 1076,208,528,4908,17828,17828,4908,528,1360,22388,
 166892,307144,166892,22388,1360,3472,102124,
 1382228,5359892,5359892,1382228,102124,3472,8912,
 465844,12894316]