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A071577 as a simple table

na(n)
11
21
31
45
55
65
75
89
99
109
119
129
139
149
159
1663
1763
1863
1963
2063
2163
2263
2363
24135
25135
26135
27135
28135
29135
30135
31135
32135
33135
34135
35135
36135
37135
38135
39135
40135
41135
42135
43135
44735
45735
46735
47945
48945
49945
501155
511155
521155
531155
541155
551155
561155

[1,1,1,5,5,5,5,9,9,9,9,9,9,9,9,63,63,63,63,63,63,
 63,63,135,135,135,135,135,135,135,135,135,135,135,
 135,135,135,135,135,135,135,135,135,735,735,735,
 945,945,945,1155,1155,1155,1155,1155,1155,1155]