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A307323 as a simple table

na(n)
01
11
24
318
474
5303
61206
74741
818466
971463
10274879
111051509
124001727
1315157935
1457170668
15214787989
16804049797
172999846236
1811156943967
1941370989836
20152973793900
21564117250793
222074959664189
237613615954760
2427871659379578
25101805487967357
26371072295698710

[1,1,4,18,74,303,1206,4741,18466,71463,274879,
 1051509,4001727,15157935,57170668,214787989,
 804049797,2999846236,11156943967,41370989836,
 152973793900,564117250793,2074959664189,
 7613615954760,27871659379578,101805487967357,
 371072295698710]