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A305840 as a simple table

na(n)
11
21
31
42
52
64
75
810
913
1023
1135
1259
1393
14154
15248
16413
17671
181111
191827
203036
215013
228348
2313859
2423122
2538534
2664434
27107715
28180509
29302565
30508032
31853507
321435828
332416941
344072943
356868062
3611591918
3719577555
3833090308
3955964327
4094715248
41160391045

[1,1,1,2,2,4,5,10,13,23,35,59,93,154,248,413,671,
 1111,1827,3036,5013,8348,13859,23122,38534,64434,
 107715,180509,302565,508032,853507,1435828,
 2416941,4072943,6868062,11591918,19577555,
 33090308,55964327,94715248,160391045]