A051809 - OEIS

A051809 as a simple table

n	a(n)
1	7
2	17
3	70
4	71
5	107
6	117
7	170
8	171
9	257
10	275
11	527
12	572
13	700
14	701
15	710
16	711
17	725
18	752
19	1007
20	1017
21	1070
22	1071
23	1107
24	1117
25	1170
26	1171
27	1257
28	1275
29	1527
30	1572
31	1700
32	1701
33	1710
34	1711
35	1725
36	1752
37	2057
38	2075
39	2157
40	2175

[7,17,70,71,107,117,170,171,257,275,527,572,700, 701,710,711,725,752,1007,1017,1070,1071,1107,1117, 1170,1171,1257,1275,1527,1572,1700,1701,1710,1711, 1725,1752,2057,2075,2157,2175]