A350536 - cp's OEIS frontend

A350536 a(n) is the smallest proper multiple of 2n+1 which contains only odd digits, or -1 if no such multiple exists.

n	a(n)
0	3
1	9
2	15
3	35
4	99
5	33
6	39
7	75
8	51
9	57
10	315
11	115
12	75
13	135
14	319
15	93
16	99
17	175
18	111
19	117
20	533
21	559
22	135
23	517
24	539
25	153
26	159
27	715
28	171
29	177
30	793
31	315
32	195
33	335
34	759
35	355
36	511
37	375
38	539
39	395
40	1377
41	913
42	595
43	957
44	979
45	1911
46	1395
47	1995
48	3395
49	9999
50	1111
51	515
52	315
53	535
54	1199
55	333

[3, 9, 15, 35, 99, 33, 39, 75, 51, 57, 315, 115, 75, 135, 319, 93, 99, 175, 111, 117, 533, 559, 135, 517, 539, 153, 159, 715, 171, 177, 793, 315, 195, 335, 759, 355, 511, 375, 539, 395, 1377, 913, 595, 957, 979, 1911, 1395, 1995, 3395, 9999, 1111, 515, 315, 535, 1199, 333]

cp's OEIS Frontend

A350536 a(n) is the smallest proper multiple of 2n+1 which contains only odd digits, or -1 if no such multiple exists.

Table of values

List of values