A256368 - cp's OEIS frontend

A256368 Primes arising from A098550(n), n >= 2, as smallest prime factor of gcd(A098550(n), A098550(n+2)).

n	a(n)
2	2
3	3
4	2
5	3
6	2
7	5
8	2
9	5
10	2
11	5
12	2
13	7
14	2
15	7
16	2
17	3
18	2
19	3
20	11
21	13
22	11
23	13
24	3
25	2
26	3
27	2
28	17
29	2
30	17
31	2
32	5
33	2
34	5
35	2
36	13
37	2
38	7
39	2
40	7
41	19
42	3
43	19
44	2
45	19
46	2
47	3
48	2
49	23
50	2
51	23
52	2
53	5
54	2
55	3
56	2
57	3
58	2
59	29
60	31
61	29
62	31
63	2
64	3
65	2
66	11
67	2
68	7
69	2

[2, 3, 2, 3, 2, 5, 2, 5, 2, 5, 2, 7, 2, 7, 2, 3, 2, 3, 11, 13, 11, 13, 3, 2, 3, 2, 17, 2, 17, 2, 5, 2, 5, 2, 13, 2, 7, 2, 7, 19, 3, 19, 2, 19, 2, 3, 2, 23, 2, 23, 2, 5, 2, 3, 2, 3, 2, 29, 31, 29, 31, 2, 3, 2, 11, 2, 7, 2]

cp's OEIS Frontend

A256368 Primes arising from A098550(n), n >= 2, as smallest prime factor of gcd(A098550(n), A098550(n+2)).

Table of values

List of values

n	a(n)
2	2
3	3
4	2
5	3
6	2
7	5
8	2
9	5
10	2
11	5
12	2
13	7
14	2
15	7
16	2
17	3
18	2
19	3
20	11
21	13
22	11
23	13
24	3
25	2
26	3
27	2
28	17
29	2
30	17
31	2
32	5
33	2
34	5
35	2
36	13
37	2
38	7
39	2
40	7
41	19
42	3
43	19
44	2
45	19
46	2
47	3
48	2
49	23
50	2
51	23
52	2
53	5
54	2
55	3
56	2
57	3
58	2
59	29
60	31
61	29
62	31
63	2
64	3
65	2
66	11
67	2
68	7
69	2

n	a(n)
2	2
3	3
4	2
5	3
6	2
7	5
8	2
9	5
10	2
11	5
12	2
13	7
14	2
15	7
16	2
17	3
18	2
19	3
20	11
21	13
22	11
23	13
24	3
25	2
26	3
27	2
28	17
29	2
30	17
31	2
32	5
33	2
34	5
35	2
36	13
37	2
38	7
39	2
40	7
41	19
42	3
43	19
44	2
45	19
46	2
47	3
48	2
49	23
50	2
51	23
52	2
53	5
54	2
55	3
56	2
57	3
58	2
59	29
60	31
61	29
62	31
63	2
64	3
65	2
66	11
67	2
68	7
69	2

n	a(n)
2	2
3	3
4	2
5	3
6	2
7	5
8	2
9	5
10	2
11	5
12	2
13	7
14	2
15	7
16	2
17	3
18	2
19	3
20	11
21	13
22	11
23	13
24	3
25	2
26	3
27	2
28	17
29	2
30	17
31	2
32	5
33	2
34	5
35	2
36	13
37	2
38	7
39	2
40	7
41	19
42	3
43	19
44	2
45	19
46	2
47	3
48	2
49	23
50	2
51	23
52	2
53	5
54	2
55	3
56	2
57	3
58	2
59	29
60	31
61	29
62	31
63	2
64	3
65	2
66	11
67	2
68	7
69	2