A336349 - cp's OEIS frontend

A336349 Square spiral of distinct positive integers constructed by greedy algorithm, such that all terms on the same row or on the same column are pairwise coprime.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	6
8	11
9	13
10	17
11	9
12	19
13	8
14	23
15	15
16	29
17	31
18	37
19	25
20	41
21	12
22	43
23	47
24	35
25	53
26	59
27	49
28	61
29	67
30	71
31	10
32	73
33	79
34	83
35	89
36	77
37	27
38	91
39	97
40	101
41	95
42	103
43	16
44	107
45	109
46	113
47	121
48	65
49	51
50	127
51	131
52	137
53	139
54	119
55	149
56	151
57	18
58	143
59	157
60	163
61	133
62	167
63	173

[1, 2, 3, 4, 5, 7, 6, 11, 13, 17, 9, 19, 8, 23, 15, 29, 31, 37, 25, 41, 12, 43, 47, 35, 53, 59, 49, 61, 67, 71, 10, 73, 79, 83, 89, 77, 27, 91, 97, 101, 95, 103, 16, 107, 109, 113, 121, 65, 51, 127, 131, 137, 139, 119, 149, 151, 18, 143, 157, 163, 133, 167, 173]

cp's OEIS Frontend

A336349 Square spiral of distinct positive integers constructed by greedy algorithm, such that all terms on the same row or on the same column are pairwise coprime.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	6
8	11
9	13
10	17
11	9
12	19
13	8
14	23
15	15
16	29
17	31
18	37
19	25
20	41
21	12
22	43
23	47
24	35
25	53
26	59
27	49
28	61
29	67
30	71
31	10
32	73
33	79
34	83
35	89
36	77
37	27
38	91
39	97
40	101
41	95
42	103
43	16
44	107
45	109
46	113
47	121
48	65
49	51
50	127
51	131
52	137
53	139
54	119
55	149
56	151
57	18
58	143
59	157
60	163
61	133
62	167
63	173

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	6
8	11
9	13
10	17
11	9
12	19
13	8
14	23
15	15
16	29
17	31
18	37
19	25
20	41
21	12
22	43
23	47
24	35
25	53
26	59
27	49
28	61
29	67
30	71
31	10
32	73
33	79
34	83
35	89
36	77
37	27
38	91
39	97
40	101
41	95
42	103
43	16
44	107
45	109
46	113
47	121
48	65
49	51
50	127
51	131
52	137
53	139
54	119
55	149
56	151
57	18
58	143
59	157
60	163
61	133
62	167
63	173

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	6
8	11
9	13
10	17
11	9
12	19
13	8
14	23
15	15
16	29
17	31
18	37
19	25
20	41
21	12
22	43
23	47
24	35
25	53
26	59
27	49
28	61
29	67
30	71
31	10
32	73
33	79
34	83
35	89
36	77
37	27
38	91
39	97
40	101
41	95
42	103
43	16
44	107
45	109
46	113
47	121
48	65
49	51
50	127
51	131
52	137
53	139
54	119
55	149
56	151
57	18
58	143
59	157
60	163
61	133
62	167
63	173