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A278989 as a simple table

na(n)
00
10
21
31
44
511
641
7162
8715
93425
1016777
1180928
12379347
131726375
147654817
1533219630
16141692075
17596122477
182480969257
1910237751324
2041963944275
21171103765747
22694775280993
232812004330666
2411352134320523
2545736973060601
26183981143571721
27739167464021912
282966826380664595
2911899055223201855

[0,0,1,1,4,11,41,162,715,3425,16777,80928,379347,
 1726375,7654817,33219630,141692075,596122477,
 2480969257,10237751324,41963944275,171103765747,
 694775280993,2812004330666,11352134320523,
 45736973060601,183981143571721,739167464021912,
 2966826380664595,11899055223201855]