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A018909 as a simple table

na(n)
03
16
213
329
465
5146
6328
7737
81657
93726
108379
1118843
1242375
1395295
14214305
15481942
161083821
172437364
185481296
1912326680
2027721007
2162340730
22140195723
23315280889
24709023335
251594495915
263585801902
278063975053
2818134770251
2940782602860
3091714461944

[3,6,13,29,65,146,328,737,1657,3726,8379,18843,
 42375,95295,214305,481942,1083821,2437364,5481296,
 12326680,27721007,62340730,140195723,315280889,
 709023335,1594495915,3585801902,8063975053,
 18134770251,40782602860,91714461944]