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A299027 as a simple table

na(n)
11
21
33
45
511
620
738
869
9125
10225
11400
12708
131244
142176
153779
166532
1711229
1819223
1932745
2055555
2193875
22158025
23265038
24443009
25738026
261225649
272029305
283350167
295515384
309055678
3114830076
3224226115
3339480306
3464190026
35104130753
36168556588
37272268482

[1,1,3,5,11,20,38,69,125,225,400,708,1244,2176,
 3779,6532,11229,19223,32745,55555,93875,158025,
 265038,443009,738026,1225649,2029305,3350167,
 5515384,9055678,14830076,24226115,39480306,
 64190026,104130753,168556588,272268482]