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A060049 as a simple table

na(n)
01
10
21
31
42
55
615
750
8181
9697
102821
1111892
1251874
13232974
141073070
155053029
1624264565
17118570292
18588567257
192963358162
2015114174106
2178004013763
22406971280545
232144659072330
2411407141925639
2561197287846831

[1,0,1,1,2,5,15,50,181,697,2821,11892,51874,
 232974,1073070,5053029,24264565,118570292,
 588567257,2963358162,15114174106,78004013763,
 406971280545,2144659072330,11407141925639,
 61197287846831]