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A006788 as a simple table

na(n)
11
21
31
42
53
65
79
816
928
1051
1193
12170
13315
14585
151092
162048
173855
187281
1913797
2026214
2149932
2295325
23182361
24349525
25671088
261290555
272485513
284793490
299256395
3017895697
3134636833
3267108864
33130150524
34252645135
35490853405
36954437176
371857283155
383616814565

[1,1,1,2,3,5,9,16,28,51,93,170,315,585,1092,2048,
 3855,7281,13797,26214,49932,95325,182361,349525,
 671088,1290555,2485513,4793490,9256395,17895697,
 34636833,67108864,130150524,252645135,490853405,
 954437176,1857283155,3616814565]