A382951 - cp's OEIS frontend

A382951 Sequence of positive integers with no repetitions and, when put in a spiral, all lines (straight or diagonal) are pairwise coprime.

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	11
8	9
9	13
10	17
11	19
12	23
13	8
14	29
15	31
16	27
17	25
18	37
19	39
20	16
21	41
22	43
23	14
24	47
25	33
26	53
27	35
28	59
29	61
30	67
31	71
32	73
33	49
34	79
35	83
36	89
37	97
38	101
39	103
40	55
41	107
42	109
43	91
44	113
45	85
46	127
47	131
48	137
49	139
50	121
51	149
52	151
53	157
54	133
55	163
56	65
57	167
58	51
59	125
60	173
61	143
62	179
63	181
64	191
65	161
66	22
67	193
68	169
69	197
70	199
71	211

[1, 2, 3, 5, 4, 7, 11, 9, 13, 17, 19, 23, 8, 29, 31, 27, 25, 37, 39, 16, 41, 43, 14, 47, 33, 53, 35, 59, 61, 67, 71, 73, 49, 79, 83, 89, 97, 101, 103, 55, 107, 109, 91, 113, 85, 127, 131, 137, 139, 121, 149, 151, 157, 133, 163, 65, 167, 51, 125, 173, 143, 179, 181, 191, 161, 22, 193, 169, 197, 199, 211]

cp's OEIS Frontend

A382951 Sequence of positive integers with no repetitions and, when put in a spiral, all lines (straight or diagonal) are pairwise coprime.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	11
8	9
9	13
10	17
11	19
12	23
13	8
14	29
15	31
16	27
17	25
18	37
19	39
20	16
21	41
22	43
23	14
24	47
25	33
26	53
27	35
28	59
29	61
30	67
31	71
32	73
33	49
34	79
35	83
36	89
37	97
38	101
39	103
40	55
41	107
42	109
43	91
44	113
45	85
46	127
47	131
48	137
49	139
50	121
51	149
52	151
53	157
54	133
55	163
56	65
57	167
58	51
59	125
60	173
61	143
62	179
63	181
64	191
65	161
66	22
67	193
68	169
69	197
70	199
71	211

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	11
8	9
9	13
10	17
11	19
12	23
13	8
14	29
15	31
16	27
17	25
18	37
19	39
20	16
21	41
22	43
23	14
24	47
25	33
26	53
27	35
28	59
29	61
30	67
31	71
32	73
33	49
34	79
35	83
36	89
37	97
38	101
39	103
40	55
41	107
42	109
43	91
44	113
45	85
46	127
47	131
48	137
49	139
50	121
51	149
52	151
53	157
54	133
55	163
56	65
57	167
58	51
59	125
60	173
61	143
62	179
63	181
64	191
65	161
66	22
67	193
68	169
69	197
70	199
71	211

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	11
8	9
9	13
10	17
11	19
12	23
13	8
14	29
15	31
16	27
17	25
18	37
19	39
20	16
21	41
22	43
23	14
24	47
25	33
26	53
27	35
28	59
29	61
30	67
31	71
32	73
33	49
34	79
35	83
36	89
37	97
38	101
39	103
40	55
41	107
42	109
43	91
44	113
45	85
46	127
47	131
48	137
49	139
50	121
51	149
52	151
53	157
54	133
55	163
56	65
57	167
58	51
59	125
60	173
61	143
62	179
63	181
64	191
65	161
66	22
67	193
68	169
69	197
70	199
71	211