A331832 - cp's OEIS frontend

A331832 Numbers k such that all the divisors of k have an odd number of 1's in their negabinary representations.

n	a(n)
1	1
2	3
3	9
4	11
5	23
6	29
7	33
8	41
9	43
10	47
11	53
12	59
13	69
14	71
15	83
16	89
17	101
18	103
19	109
20	113
21	129
22	131
23	137
24	139
25	149
26	151
27	157
28	163
29	181
30	191
31	197
32	199
33	211
34	227
35	233
36	239
37	249
38	251
39	263
40	269
41	281
42	283
43	293
44	307
45	311
46	317
47	331
48	349
49	353
50	367
51	373
52	379
53	383
54	389
55	397
56	401

[1, 3, 9, 11, 23, 29, 33, 41, 43, 47, 53, 59, 69, 71, 83, 89, 101, 103, 109, 113, 129, 131, 137, 139, 149, 151, 157, 163, 181, 191, 197, 199, 211, 227, 233, 239, 249, 251, 263, 269, 281, 283, 293, 307, 311, 317, 331, 349, 353, 367, 373, 379, 383, 389, 397, 401]

cp's OEIS Frontend

A331832 Numbers k such that all the divisors of k have an odd number of 1's in their negabinary representations.

Table of values

List of values

n	a(n)
1	1
2	3
3	9
4	11
5	23
6	29
7	33
8	41
9	43
10	47
11	53
12	59
13	69
14	71
15	83
16	89
17	101
18	103
19	109
20	113
21	129
22	131
23	137
24	139
25	149
26	151
27	157
28	163
29	181
30	191
31	197
32	199
33	211
34	227
35	233
36	239
37	249
38	251
39	263
40	269
41	281
42	283
43	293
44	307
45	311
46	317
47	331
48	349
49	353
50	367
51	373
52	379
53	383
54	389
55	397
56	401

n	a(n)
1	1
2	3
3	9
4	11
5	23
6	29
7	33
8	41
9	43
10	47
11	53
12	59
13	69
14	71
15	83
16	89
17	101
18	103
19	109
20	113
21	129
22	131
23	137
24	139
25	149
26	151
27	157
28	163
29	181
30	191
31	197
32	199
33	211
34	227
35	233
36	239
37	249
38	251
39	263
40	269
41	281
42	283
43	293
44	307
45	311
46	317
47	331
48	349
49	353
50	367
51	373
52	379
53	383
54	389
55	397
56	401

n	a(n)
1	1
2	3
3	9
4	11
5	23
6	29
7	33
8	41
9	43
10	47
11	53
12	59
13	69
14	71
15	83
16	89
17	101
18	103
19	109
20	113
21	129
22	131
23	137
24	139
25	149
26	151
27	157
28	163
29	181
30	191
31	197
32	199
33	211
34	227
35	233
36	239
37	249
38	251
39	263
40	269
41	281
42	283
43	293
44	307
45	311
46	317
47	331
48	349
49	353
50	367
51	373
52	379
53	383
54	389
55	397
56	401