A024766 - OEIS

A024766 as a simple table

n	a(n)
1	2
2	3
3	5
4	21
5	25
6	31
7	35
8	51
9	211
10	215
11	251
12	255
13	351
14	515
15	2115
16	2151
17	2155
18	2511
19	2551
20	2555
21	3515
22	5155
23	21155
24	21515
25	21551
26	21555
27	25115
28	25515
29	35155
30	51551
31	51555
32	215515
33	215555
34	515511
35	515551
36	2155555

[2,3,5,21,25,31,35,51,211,215,251,255,351,515, 2115,2151,2155,2511,2551,2555,3515,5155,21155, 21515,21551,21555,25115,25515,35155,51551,51555, 215515,215555,515511,515551,2155555]