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A054159 as a simple table

na(n)
00
11
21
32
44
58
615
727
851
993
10174
11329
12620
131177
142250
154308
168286
1715961
1830871
1959792
20116083
21225754
22439666
23857554
241674630
253273944
266407147
2712550615
2824605525
2948277287
3094790704
31186242926
32366153007
33720274117
341417640576

[0,1,1,2,4,8,15,27,51,93,174,329,620,1177,2250,
 4308,8286,15961,30871,59792,116083,225754,439666,
 857554,1674630,3273944,6407147,12550615,24605525,
 48277287,94790704,186242926,366153007,720274117,
 1417640576]