A346722 - cp's OEIS frontend

A346722 Use the cells of a hexagonal grid to represent the algebraic integers in the integer ring of Q(sqrt(-11)) as explained in the comments. Number the cells along the counterclockwise hexagonal spiral that starts with cells 0 and 1 representing integers 0 and 1. List the cells that represent 0 or a prime in the ring.

n	a(n)
1	0
2	2
3	3
4	5
5	6
6	7
7	8
8	9
9	11
10	13
11	14
12	15
13	17
14	37
15	43
16	49
17	55
18	61
19	62
20	64
21	66
22	68
23	69
24	71
25	74
26	76
27	77
28	79
29	81
30	83
31	84
32	86
33	89
34	103
35	107
36	121
37	125
38	128
39	131
40	133
41	135
42	138
43	142
44	145
45	149
46	152
47	154
48	156
49	159
50	163
51	166
52	173
53	175
54	177
55	179
56	197
57	199
58	201
59	203

[0, 2, 3, 5, 6, 7, 8, 9, 11, 13, 14, 15, 17, 37, 43, 49, 55, 61, 62, 64, 66, 68, 69, 71, 74, 76, 77, 79, 81, 83, 84, 86, 89, 103, 107, 121, 125, 128, 131, 133, 135, 138, 142, 145, 149, 152, 154, 156, 159, 163, 166, 173, 175, 177, 179, 197, 199, 201, 203]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
1	0
2	2
3	3
4	5
5	6
6	7
7	8
8	9
9	11
10	13
11	14
12	15
13	17
14	37
15	43
16	49
17	55
18	61
19	62
20	64
21	66
22	68
23	69
24	71
25	74
26	76
27	77
28	79
29	81
30	83
31	84
32	86
33	89
34	103
35	107
36	121
37	125
38	128
39	131
40	133
41	135
42	138
43	142
44	145
45	149
46	152
47	154
48	156
49	159
50	163
51	166
52	173
53	175
54	177
55	179
56	197
57	199
58	201
59	203

n	a(n)
1	0
2	2
3	3
4	5
5	6
6	7
7	8
8	9
9	11
10	13
11	14
12	15
13	17
14	37
15	43
16	49
17	55
18	61
19	62
20	64
21	66
22	68
23	69
24	71
25	74
26	76
27	77
28	79
29	81
30	83
31	84
32	86
33	89
34	103
35	107
36	121
37	125
38	128
39	131
40	133
41	135
42	138
43	142
44	145
45	149
46	152
47	154
48	156
49	159
50	163
51	166
52	173
53	175
54	177
55	179
56	197
57	199
58	201
59	203

n	a(n)
1	0
2	2
3	3
4	5
5	6
6	7
7	8
8	9
9	11
10	13
11	14
12	15
13	17
14	37
15	43
16	49
17	55
18	61
19	62
20	64
21	66
22	68
23	69
24	71
25	74
26	76
27	77
28	79
29	81
30	83
31	84
32	86
33	89
34	103
35	107
36	121
37	125
38	128
39	131
40	133
41	135
42	138
43	142
44	145
45	149
46	152
47	154
48	156
49	159
50	163
51	166
52	173
53	175
54	177
55	179
56	197
57	199
58	201
59	203