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A027711 as a simple table

na(n)
10
21
32
44
59
621
747
8101
9212
10440
11907
121859
133791
147699
1515586
1631476
1763445
18127689
19256671
20515433
211034248
222073968
234156791
248327911
2516679007
2633395527
2766851750
28133801708
29267762321
30535781757
311071979535

[0,1,2,4,9,21,47,101,212,440,907,1859,3791,7699,
 15586,31476,63445,127689,256671,515433,1034248,
 2073968,4156791,8327911,16679007,33395527,
 66851750,133801708,267762321,535781757,1071979535]