A174453 - cp's OEIS frontend

A174453 a(n) is the smallest k >= 1 for which gcd(m + (-1)^m, m + n - 4) > 1, where m = n + k - 1.

n	a(n)
5	1
6	2
7	1
8	1
9	1
10	5
11	1
12	2
13	1
14	1
15	1
16	12
17	1
18	2
19	1
20	1
21	1
22	18
23	1
24	2
25	1
26	1
27	1
28	4
29	1
30	2
31	1
32	1
33	1
34	30
35	1
36	2
37	1
38	1
39	1
40	5
41	1
42	2
43	1
44	1
45	1
46	42
47	1
48	2
49	1
50	1
51	1
52	6
53	1
54	2
55	1
56	1
57	1
58	4
59	1
60	2
61	1
62	1
63	1
64	60
65	1
66	2
67	1
68	1
69	1
70	5
71	1
72	2
73	1
74	1
75	1
76	72
77	1
78	2
79	1
80	1
81	1
82	9
83	1
84	2
85	1
86	1
87	1
88	4
89	1
90	2
91	1
92	1
93	1
94	6
95	1
96	2
97	1
98	1
99	1
100	5
101	1
102	2
103	1
104	1
105	1
106	102

[1, 2, 1, 1, 1, 5, 1, 2, 1, 1, 1, 12, 1, 2, 1, 1, 1, 18, 1, 2, 1, 1, 1, 4, 1, 2, 1, 1, 1, 30, 1, 2, 1, 1, 1, 5, 1, 2, 1, 1, 1, 42, 1, 2, 1, 1, 1, 6, 1, 2, 1, 1, 1, 4, 1, 2, 1, 1, 1, 60, 1, 2, 1, 1, 1, 5, 1, 2, 1, 1, 1, 72, 1, 2, 1, 1, 1, 9, 1, 2, 1, 1, 1, 4, 1, 2, 1, 1, 1, 6, 1, 2, 1, 1, 1, 5, 1, 2, 1, 1, 1, 102]

cp's OEIS Frontend

A174453 a(n) is the smallest k >= 1 for which gcd(m + (-1)^m, m + n - 4) > 1, where m = n + k - 1.

Table of values

List of values

n	a(n)
5	1
6	2
7	1
8	1
9	1
10	5
11	1
12	2
13	1
14	1
15	1
16	12
17	1
18	2
19	1
20	1
21	1
22	18
23	1
24	2
25	1
26	1
27	1
28	4
29	1
30	2
31	1
32	1
33	1
34	30
35	1
36	2
37	1
38	1
39	1
40	5
41	1
42	2
43	1
44	1
45	1
46	42
47	1
48	2
49	1
50	1
51	1
52	6
53	1
54	2
55	1
56	1
57	1
58	4
59	1
60	2
61	1
62	1
63	1
64	60
65	1
66	2
67	1
68	1
69	1
70	5
71	1
72	2
73	1
74	1
75	1
76	72
77	1
78	2
79	1
80	1
81	1
82	9
83	1
84	2
85	1
86	1
87	1
88	4
89	1
90	2
91	1
92	1
93	1
94	6
95	1
96	2
97	1
98	1
99	1
100	5
101	1
102	2
103	1
104	1
105	1
106	102

n	a(n)
5	1
6	2
7	1
8	1
9	1
10	5
11	1
12	2
13	1
14	1
15	1
16	12
17	1
18	2
19	1
20	1
21	1
22	18
23	1
24	2
25	1
26	1
27	1
28	4
29	1
30	2
31	1
32	1
33	1
34	30
35	1
36	2
37	1
38	1
39	1
40	5
41	1
42	2
43	1
44	1
45	1
46	42
47	1
48	2
49	1
50	1
51	1
52	6
53	1
54	2
55	1
56	1
57	1
58	4
59	1
60	2
61	1
62	1
63	1
64	60
65	1
66	2
67	1
68	1
69	1
70	5
71	1
72	2
73	1
74	1
75	1
76	72
77	1
78	2
79	1
80	1
81	1
82	9
83	1
84	2
85	1
86	1
87	1
88	4
89	1
90	2
91	1
92	1
93	1
94	6
95	1
96	2
97	1
98	1
99	1
100	5
101	1
102	2
103	1
104	1
105	1
106	102

n	a(n)
5	1
6	2
7	1
8	1
9	1
10	5
11	1
12	2
13	1
14	1
15	1
16	12
17	1
18	2
19	1
20	1
21	1
22	18
23	1
24	2
25	1
26	1
27	1
28	4
29	1
30	2
31	1
32	1
33	1
34	30
35	1
36	2
37	1
38	1
39	1
40	5
41	1
42	2
43	1
44	1
45	1
46	42
47	1
48	2
49	1
50	1
51	1
52	6
53	1
54	2
55	1
56	1
57	1
58	4
59	1
60	2
61	1
62	1
63	1
64	60
65	1
66	2
67	1
68	1
69	1
70	5
71	1
72	2
73	1
74	1
75	1
76	72
77	1
78	2
79	1
80	1
81	1
82	9
83	1
84	2
85	1
86	1
87	1
88	4
89	1
90	2
91	1
92	1
93	1
94	6
95	1
96	2
97	1
98	1
99	1
100	5
101	1
102	2
103	1
104	1
105	1
106	102