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A300345 as a simple table

na(n)
11
26
39
426
557
6133
7306
8709
91642
103805
118811
1220409
1347276
14109514
15253686
16587661
171361316
183153496
197305099
2016922333
2139200767
2290809027
23210360189
24487301922
251128840861
262614973750
276057619008
2814032549467
2932506574899
3075301884294

[1,6,9,26,57,133,306,709,1642,3805,8811,20409,
 47276,109514,253686,587661,1361316,3153496,
 7305099,16922333,39200767,90809027,210360189,
 487301922,1128840861,2614973750,6057619008,
 14032549467,32506574899,75301884294]