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A006196 as a simple table

na(n)
00
11
21
31
42
54
68
717
838
987
10203
11482
121160
132822
146929
1517149
1642736
17107144
18270060
19683940
201739511
214441255
2211378814
2329245927
2475386341
25194838673
26504802508
271310843123
283411070837
298893590439
3023230151744
3160780377599
32159281030250

[0,1,1,1,2,4,8,17,38,87,203,482,1160,2822,6929,
 17149,42736,107144,270060,683940,1739511,4441255,
 11378814,29245927,75386341,194838673,504802508,
 1310843123,3411070837,8893590439,23230151744,
 60780377599,159281030250]