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A101490 as a simple table

na(n)
00
11
21
33
48
525
680
7267
8911
93170
1011192
1139993
12144320
13525124
141924196
157093603
1626288928
1797878831
18365918064
191372982706
205168555770
2119514482964
2273876936272
23280363191353
241066357904128
254064204607372

[0,1,1,3,8,25,80,267,911,3170,11192,39993,144320,
 525124,1924196,7093603,26288928,97878831,
 365918064,1372982706,5168555770,19514482964,
 73876936272,280363191353,1066357904128,
 4064204607372]