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A209816 as a simple table

na(n)
11
23
37
415
530
658
7105
8186
9318
10530
11863
121380
132164
143345
155096
167665
1711395
1816765
1924418
2035251
2150460
2271669
23101050
24141510
25196888
26272293
27374423
28512081
29696760
30943442
311271527
321706159
332279700
343033772
354021695
365311627
376990367
389168321

[1,3,7,15,30,58,105,186,318,530,863,1380,2164,
 3345,5096,7665,11395,16765,24418,35251,50460,
 71669,101050,141510,196888,272293,374423,512081,
 696760,943442,1271527,1706159,2279700,3033772,
 4021695,5311627,6990367,9168321]