A345436 - cp's OEIS frontend

A345436 Represent the ring of Gaussian integers E = {x+y*i: x, y rational integers, i = sqrt(-1)} by the cells of a square grid; number the cells of the grid along a counterclockwise square spiral, with the cells representing the ring identities 0, 1 numbered 0, 1. Sequence lists the index numbers of the cells which are 0 or a prime in E.

n	a(n)
1	0
2	2
3	4
4	6
5	8
6	9
7	11
8	13
9	15
10	17
11	19
12	21
13	23
14	25
15	27
16	29
17	31
18	33
19	35
20	37
21	39
22	41
23	43
24	45
25	47
26	51
27	53
28	59
29	61
30	67
31	69
32	75
33	77
34	81
35	83
36	87
37	89
38	91
39	93
40	97
41	99
42	101
43	103
44	107
45	109
46	111
47	113
48	117
49	119
50	121
51	125
52	127
53	131
54	133
55	137
56	139
57	143
58	145
59	149
60	151
61	155
62	157

[0, 2, 4, 6, 8, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 51, 53, 59, 61, 67, 69, 75, 77, 81, 83, 87, 89, 91, 93, 97, 99, 101, 103, 107, 109, 111, 113, 117, 119, 121, 125, 127, 131, 133, 137, 139, 143, 145, 149, 151, 155, 157]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
1	0
2	2
3	4
4	6
5	8
6	9
7	11
8	13
9	15
10	17
11	19
12	21
13	23
14	25
15	27
16	29
17	31
18	33
19	35
20	37
21	39
22	41
23	43
24	45
25	47
26	51
27	53
28	59
29	61
30	67
31	69
32	75
33	77
34	81
35	83
36	87
37	89
38	91
39	93
40	97
41	99
42	101
43	103
44	107
45	109
46	111
47	113
48	117
49	119
50	121
51	125
52	127
53	131
54	133
55	137
56	139
57	143
58	145
59	149
60	151
61	155
62	157

n	a(n)
1	0
2	2
3	4
4	6
5	8
6	9
7	11
8	13
9	15
10	17
11	19
12	21
13	23
14	25
15	27
16	29
17	31
18	33
19	35
20	37
21	39
22	41
23	43
24	45
25	47
26	51
27	53
28	59
29	61
30	67
31	69
32	75
33	77
34	81
35	83
36	87
37	89
38	91
39	93
40	97
41	99
42	101
43	103
44	107
45	109
46	111
47	113
48	117
49	119
50	121
51	125
52	127
53	131
54	133
55	137
56	139
57	143
58	145
59	149
60	151
61	155
62	157

n	a(n)
1	0
2	2
3	4
4	6
5	8
6	9
7	11
8	13
9	15
10	17
11	19
12	21
13	23
14	25
15	27
16	29
17	31
18	33
19	35
20	37
21	39
22	41
23	43
24	45
25	47
26	51
27	53
28	59
29	61
30	67
31	69
32	75
33	77
34	81
35	83
36	87
37	89
38	91
39	93
40	97
41	99
42	101
43	103
44	107
45	109
46	111
47	113
48	117
49	119
50	121
51	125
52	127
53	131
54	133
55	137
56	139
57	143
58	145
59	149
60	151
61	155
62	157