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A261847 as a simple table

na(n)
01
19
245
3975
43465
525047
6471669
71542519
88361540
943916950
10934748298
112560160538
1212924414750
1352656337800
14271075650210
155853558884496
1614764118156523
1765116959410547
18241547985000289
191004388404964615
204276652360222781
21104392134731727315

[1,9,45,975,3465,25047,471669,1542519,8361540,
 43916950,934748298,2560160538,12924414750,
 52656337800,271075650210,5853558884496,
 14764118156523,65116959410547,241547985000289,
 1004388404964615,4276652360222781,
 104392134731727315]