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A003604 as a simple table

na(n)
00
10
21
33
49
530
6128
7675
84231
930969
10258689
112428956
1225306287
13289620751
143610490805
1548686912930
16706003798139
1710953617995740
18181035032207760
193175094503778521
2058893601709552538
211151825702178908788
2223688535118132456668
23511050155316058710033

[0,0,1,3,9,30,128,675,4231,30969,258689,2428956,
 25306287,289620751,3610490805,48686912930,
 706003798139,10953617995740,181035032207760,
 3175094503778521,58893601709552538,
 1151825702178908788,23688535118132456668,
 511050155316058710033]