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A003408 as a simple table

na(n)
01
19
266
3455
43060
520349
6134596
7888030
85852925
938567100
10254186856
111676056044
1211058116888
1373006209045
14482320623240
153188675231420
1621094923659355
17139646485582065
18925029565741050
196131164307078475
2040661170824914640
21269807672771096460

[1,9,66,455,3060,20349,134596,888030,5852925,
 38567100,254186856,1676056044,11058116888,
 73006209045,482320623240,3188675231420,
 21094923659355,139646485582065,925029565741050,
 6131164307078475,40661170824914640,
 269807672771096460]