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A373300 as a simple table

na(n)
11
25
315
445
5105
6264
7555
81221
92445
104935
119324
1217941
1332522
1459400
15104808
16184569
17315711
18540540
19902335
201504800
212462724
224014513
236444425
2410316250
2516283707
2625610886
2739841865
2861720659
2994687230
30144731706
31219282679
32330996105
33495901413
34740046425

[1,5,15,45,105,264,555,1221,2445,4935,9324,17941,
 32522,59400,104808,184569,315711,540540,902335,
 1504800,2462724,4014513,6444425,10316250,16283707,
 25610886,39841865,61720659,94687230,144731706,
 219282679,330996105,495901413,740046425]