A331833 - cp's OEIS frontend

A331833 Numbers k such that all the divisors of k, excluding 1, have an even number of 1's in their negabinary representations.

n	a(n)
1	1
2	2
3	5
4	7
5	10
6	13
7	14
8	17
9	19
10	25
11	31
12	34
13	37
14	49
15	61
16	62
17	65
18	67
19	73
20	79
21	85
22	97
23	107
24	127
25	133
26	155
27	167
28	170
29	173
30	179
31	193
32	214
33	217
34	223
35	229
36	241
37	247
38	254
39	257
40	259
41	271
42	277
43	289
44	310
45	313
46	325
47	334
48	337
49	347
50	359
51	365
52	395
53	419
54	425
55	427
56	431
57	434
58	443

[1, 2, 5, 7, 10, 13, 14, 17, 19, 25, 31, 34, 37, 49, 61, 62, 65, 67, 73, 79, 85, 97, 107, 127, 133, 155, 167, 170, 173, 179, 193, 214, 217, 223, 229, 241, 247, 254, 257, 259, 271, 277, 289, 310, 313, 325, 334, 337, 347, 359, 365, 395, 419, 425, 427, 431, 434, 443]

cp's OEIS Frontend

A331833 Numbers k such that all the divisors of k, excluding 1, have an even number of 1's in their negabinary representations.

Table of values

List of values

n	a(n)
1	1
2	2
3	5
4	7
5	10
6	13
7	14
8	17
9	19
10	25
11	31
12	34
13	37
14	49
15	61
16	62
17	65
18	67
19	73
20	79
21	85
22	97
23	107
24	127
25	133
26	155
27	167
28	170
29	173
30	179
31	193
32	214
33	217
34	223
35	229
36	241
37	247
38	254
39	257
40	259
41	271
42	277
43	289
44	310
45	313
46	325
47	334
48	337
49	347
50	359
51	365
52	395
53	419
54	425
55	427
56	431
57	434
58	443

n	a(n)
1	1
2	2
3	5
4	7
5	10
6	13
7	14
8	17
9	19
10	25
11	31
12	34
13	37
14	49
15	61
16	62
17	65
18	67
19	73
20	79
21	85
22	97
23	107
24	127
25	133
26	155
27	167
28	170
29	173
30	179
31	193
32	214
33	217
34	223
35	229
36	241
37	247
38	254
39	257
40	259
41	271
42	277
43	289
44	310
45	313
46	325
47	334
48	337
49	347
50	359
51	365
52	395
53	419
54	425
55	427
56	431
57	434
58	443

n	a(n)
1	1
2	2
3	5
4	7
5	10
6	13
7	14
8	17
9	19
10	25
11	31
12	34
13	37
14	49
15	61
16	62
17	65
18	67
19	73
20	79
21	85
22	97
23	107
24	127
25	133
26	155
27	167
28	170
29	173
30	179
31	193
32	214
33	217
34	223
35	229
36	241
37	247
38	254
39	257
40	259
41	271
42	277
43	289
44	310
45	313
46	325
47	334
48	337
49	347
50	359
51	365
52	395
53	419
54	425
55	427
56	431
57	434
58	443