A255480 - cp's OEIS frontend

A255480 a(n) = gcd(b(n),b(n-2)), where b(n) = A255582(n).

n	a(n)
3	1
4	2
5	3
6	4
7	3
8	2
9	3
10	5
11	2
12	5
13	7
14	3
15	7
16	2
17	3
18	4
19	3
20	4
21	11
22	2
23	11
24	13
25	2
26	13
27	4
28	3
29	2
30	5
31	17
32	5
33	17
34	5
35	3
36	2
37	6
38	19
39	4
40	19
41	2
42	3
43	23
44	3
45	23
46	2
47	3
48	2
49	2
50	4
51	29
52	7
53	29
54	7
55	3
56	7
57	2
58	11
59	31
60	5
61	31
62	5
63	3
64	2
65	2
66	4
67	37
68	4
69	37
70	3
71	3
72	5
73	3
74	4
75	9
76	2
77	6
78	41
79	2
80	41
81	43
82	3
83	43
84	8
85	3
86	4
87	17

[1, 2, 3, 4, 3, 2, 3, 5, 2, 5, 7, 3, 7, 2, 3, 4, 3, 4, 11, 2, 11, 13, 2, 13, 4, 3, 2, 5, 17, 5, 17, 5, 3, 2, 6, 19, 4, 19, 2, 3, 23, 3, 23, 2, 3, 2, 2, 4, 29, 7, 29, 7, 3, 7, 2, 11, 31, 5, 31, 5, 3, 2, 2, 4, 37, 4, 37, 3, 3, 5, 3, 4, 9, 2, 6, 41, 2, 41, 43, 3, 43, 8, 3, 4, 17]

cp's OEIS Frontend

A255480 a(n) = gcd(b(n),b(n-2)), where b(n) = A255582(n).

Table of values

List of values

n	a(n)
3	1
4	2
5	3
6	4
7	3
8	2
9	3
10	5
11	2
12	5
13	7
14	3
15	7
16	2
17	3
18	4
19	3
20	4
21	11
22	2
23	11
24	13
25	2
26	13
27	4
28	3
29	2
30	5
31	17
32	5
33	17
34	5
35	3
36	2
37	6
38	19
39	4
40	19
41	2
42	3
43	23
44	3
45	23
46	2
47	3
48	2
49	2
50	4
51	29
52	7
53	29
54	7
55	3
56	7
57	2
58	11
59	31
60	5
61	31
62	5
63	3
64	2
65	2
66	4
67	37
68	4
69	37
70	3
71	3
72	5
73	3
74	4
75	9
76	2
77	6
78	41
79	2
80	41
81	43
82	3
83	43
84	8
85	3
86	4
87	17

n	a(n)
3	1
4	2
5	3
6	4
7	3
8	2
9	3
10	5
11	2
12	5
13	7
14	3
15	7
16	2
17	3
18	4
19	3
20	4
21	11
22	2
23	11
24	13
25	2
26	13
27	4
28	3
29	2
30	5
31	17
32	5
33	17
34	5
35	3
36	2
37	6
38	19
39	4
40	19
41	2
42	3
43	23
44	3
45	23
46	2
47	3
48	2
49	2
50	4
51	29
52	7
53	29
54	7
55	3
56	7
57	2
58	11
59	31
60	5
61	31
62	5
63	3
64	2
65	2
66	4
67	37
68	4
69	37
70	3
71	3
72	5
73	3
74	4
75	9
76	2
77	6
78	41
79	2
80	41
81	43
82	3
83	43
84	8
85	3
86	4
87	17

n	a(n)
3	1
4	2
5	3
6	4
7	3
8	2
9	3
10	5
11	2
12	5
13	7
14	3
15	7
16	2
17	3
18	4
19	3
20	4
21	11
22	2
23	11
24	13
25	2
26	13
27	4
28	3
29	2
30	5
31	17
32	5
33	17
34	5
35	3
36	2
37	6
38	19
39	4
40	19
41	2
42	3
43	23
44	3
45	23
46	2
47	3
48	2
49	2
50	4
51	29
52	7
53	29
54	7
55	3
56	7
57	2
58	11
59	31
60	5
61	31
62	5
63	3
64	2
65	2
66	4
67	37
68	4
69	37
70	3
71	3
72	5
73	3
74	4
75	9
76	2
77	6
78	41
79	2
80	41
81	43
82	3
83	43
84	8
85	3
86	4
87	17