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A304540 as a simple table

na(n)
15
217
319
470
5124
6328
7808
82265
96025
1017221
1150786
12150521
13450244
141372877
154203380
1612926183
1739917505
18123702709
19384029038
201194002908
213716951098
2211582357384
2336113695489
24112659146087
25351593620707
261097602370102

[5,17,19,70,124,328,808,2265,6025,17221,50786,
 150521,450244,1372877,4203380,12926183,39917505,
 123702709,384029038,1194002908,3716951098,
 11582357384,36113695489,112659146087,351593620707,
 1097602370102]