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A306200 as a simple table

na(n)
00
11
21
32
44
58
618
741
898
9237
10591
111488
123805
139820
1425593
1567184
16177604
17472177
181261998
193388434
209136019
2124724904
2267141940
23182892368
24499608724
251368340326
263756651116
2710336434585
2828499309291
2978727891420
30217870037932
31603934911859
321676720329410

[0,1,1,2,4,8,18,41,98,237,591,1488,3805,9820,
 25593,67184,177604,472177,1261998,3388434,9136019,
 24724904,67141940,182892368,499608724,1368340326,
 3756651116,10336434585,28499309291,78727891420,
 217870037932,603934911859,1676720329410]