A084331 - cp's OEIS frontend

A084331 a(1) = 2; a(n+1) is the least prime p not already used such that |p-a(n)| is not equal to |a(k+1)-a(k)| for any k < n.

n	a(n)
1	2
2	3
3	5
4	11
5	7
6	17
7	29
8	13
9	31
10	23
11	37
12	59
13	19
14	43
15	71
16	41
17	61
18	97
19	47
20	73
21	107
22	53
23	101
24	139
25	67
26	109
27	167
28	79
29	131
30	163
31	83
32	127
33	173
34	89
35	149
36	211
37	103
38	179
39	113
40	181
41	251
42	137
43	193
44	257
45	151
46	229
47	311
48	157
49	269
50	359
51	191
52	277
53	373
54	197
55	271
56	389
57	199
58	293

[2, 3, 5, 11, 7, 17, 29, 13, 31, 23, 37, 59, 19, 43, 71, 41, 61, 97, 47, 73, 107, 53, 101, 139, 67, 109, 167, 79, 131, 163, 83, 127, 173, 89, 149, 211, 103, 179, 113, 181, 251, 137, 193, 257, 151, 229, 311, 157, 269, 359, 191, 277, 373, 197, 271, 389, 199, 293]

cp's OEIS Frontend

A084331 a(1) = 2; a(n+1) is the least prime p not already used such that |p-a(n)| is not equal to |a(k+1)-a(k)| for any k < n.

Table of values

List of values

n	a(n)
1	2
2	3
3	5
4	11
5	7
6	17
7	29
8	13
9	31
10	23
11	37
12	59
13	19
14	43
15	71
16	41
17	61
18	97
19	47
20	73
21	107
22	53
23	101
24	139
25	67
26	109
27	167
28	79
29	131
30	163
31	83
32	127
33	173
34	89
35	149
36	211
37	103
38	179
39	113
40	181
41	251
42	137
43	193
44	257
45	151
46	229
47	311
48	157
49	269
50	359
51	191
52	277
53	373
54	197
55	271
56	389
57	199
58	293

n	a(n)
1	2
2	3
3	5
4	11
5	7
6	17
7	29
8	13
9	31
10	23
11	37
12	59
13	19
14	43
15	71
16	41
17	61
18	97
19	47
20	73
21	107
22	53
23	101
24	139
25	67
26	109
27	167
28	79
29	131
30	163
31	83
32	127
33	173
34	89
35	149
36	211
37	103
38	179
39	113
40	181
41	251
42	137
43	193
44	257
45	151
46	229
47	311
48	157
49	269
50	359
51	191
52	277
53	373
54	197
55	271
56	389
57	199
58	293

n	a(n)
1	2
2	3
3	5
4	11
5	7
6	17
7	29
8	13
9	31
10	23
11	37
12	59
13	19
14	43
15	71
16	41
17	61
18	97
19	47
20	73
21	107
22	53
23	101
24	139
25	67
26	109
27	167
28	79
29	131
30	163
31	83
32	127
33	173
34	89
35	149
36	211
37	103
38	179
39	113
40	181
41	251
42	137
43	193
44	257
45	151
46	229
47	311
48	157
49	269
50	359
51	191
52	277
53	373
54	197
55	271
56	389
57	199
58	293