A219674 - cp's OEIS frontend

A219674 a(n) = smallest prime not included earlier such that a(n-4) + a(n-3) + a(n-2) + a(n-1) + a(n) is a prime, with a(1)=1, a(2)=3, a(3)=5, and a(4)=7.

n	a(n)
1	1
2	3
3	5
4	7
5	13
6	19
7	17
8	11
9	23
10	31
11	67
12	41
13	29
14	43
15	47
16	37
17	71
18	53
19	61
20	59
21	73
22	101
23	79
24	89
25	97
26	83
27	109
28	113
29	107
30	151
31	127
32	103
33	131
34	149
35	137
36	139
37	163
38	173
39	157
40	179
41	167
42	181
43	193
44	191
45	197
46	229
47	199
48	223
49	239
50	227
51	241
52	233
53	211
54	251
55	257
56	271
57	269
58	313
59	263

[1, 3, 5, 7, 13, 19, 17, 11, 23, 31, 67, 41, 29, 43, 47, 37, 71, 53, 61, 59, 73, 101, 79, 89, 97, 83, 109, 113, 107, 151, 127, 103, 131, 149, 137, 139, 163, 173, 157, 179, 167, 181, 193, 191, 197, 229, 199, 223, 239, 227, 241, 233, 211, 251, 257, 271, 269, 313, 263]

cp's OEIS Frontend

A219674 a(n) = smallest prime not included earlier such that a(n-4) + a(n-3) + a(n-2) + a(n-1) + a(n) is a prime, with a(1)=1, a(2)=3, a(3)=5, and a(4)=7.

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	13
6	19
7	17
8	11
9	23
10	31
11	67
12	41
13	29
14	43
15	47
16	37
17	71
18	53
19	61
20	59
21	73
22	101
23	79
24	89
25	97
26	83
27	109
28	113
29	107
30	151
31	127
32	103
33	131
34	149
35	137
36	139
37	163
38	173
39	157
40	179
41	167
42	181
43	193
44	191
45	197
46	229
47	199
48	223
49	239
50	227
51	241
52	233
53	211
54	251
55	257
56	271
57	269
58	313
59	263

n	a(n)
1	1
2	3
3	5
4	7
5	13
6	19
7	17
8	11
9	23
10	31
11	67
12	41
13	29
14	43
15	47
16	37
17	71
18	53
19	61
20	59
21	73
22	101
23	79
24	89
25	97
26	83
27	109
28	113
29	107
30	151
31	127
32	103
33	131
34	149
35	137
36	139
37	163
38	173
39	157
40	179
41	167
42	181
43	193
44	191
45	197
46	229
47	199
48	223
49	239
50	227
51	241
52	233
53	211
54	251
55	257
56	271
57	269
58	313
59	263

n	a(n)
1	1
2	3
3	5
4	7
5	13
6	19
7	17
8	11
9	23
10	31
11	67
12	41
13	29
14	43
15	47
16	37
17	71
18	53
19	61
20	59
21	73
22	101
23	79
24	89
25	97
26	83
27	109
28	113
29	107
30	151
31	127
32	103
33	131
34	149
35	137
36	139
37	163
38	173
39	157
40	179
41	167
42	181
43	193
44	191
45	197
46	229
47	199
48	223
49	239
50	227
51	241
52	233
53	211
54	251
55	257
56	271
57	269
58	313
59	263