A247870 - cp's OEIS frontend

A247870 Least prime factor of odd numbers congruent to 4 modulo 9.

n	a(n)
1	7
2	5
3	11
4	5
5	13
6	5
7	7
8	11
9	5
10	17
11	7
12	5
13	13
14	11
15	5
16	7
17	19
18	5
19	7
20	17
21	5
22	5
23	29
24	5
25	11
26	7
27	13
28	5
29	17
30	7
31	5
32	11
33	31
34	5
35	7
36	23
37	5
38	19
39	7
40	5
41	29
42	13
43	5
44	11
45	5
46	7
47	5
48	23
49	13
50	7
51	5
52	5
53	7
54	43
55	5
56	11
57	17
58	7
59	19
60	5
61	23
62	5
63	11
64	13
65	5
66	41
67	7
68	47
69	17
70	5
71	31
72	11
73	7
74	5
75	13
76	29
77	5
78	7
79	23
80	37
81	11
82	5
83	17
84	7
85	13
86	5
87	43
88	19
89	5
90	5
91	7
92	17
93	5
94	11

[7, 5, 11, 5, 13, 5, 7, 11, 5, 17, 7, 5, 13, 11, 5, 7, 19, 5, 7, 17, 5, 5, 29, 5, 11, 7, 13, 5, 17, 7, 5, 11, 31, 5, 7, 23, 5, 19, 7, 5, 29, 13, 5, 11, 5, 7, 5, 23, 13, 7, 5, 5, 7, 43, 5, 11, 17, 7, 19, 5, 23, 5, 11, 13, 5, 41, 7, 47, 17, 5, 31, 11, 7, 5, 13, 29, 5, 7, 23, 37, 11, 5, 17, 7, 13, 5, 43, 19, 5, 5, 7, 17, 5, 11]

cp's OEIS Frontend

A247870 Least prime factor of odd numbers congruent to 4 modulo 9.

Table of values

List of values

n	a(n)
1	7
2	5
3	11
4	5
5	13
6	5
7	7
8	11
9	5
10	17
11	7
12	5
13	13
14	11
15	5
16	7
17	19
18	5
19	7
20	17
21	5
22	5
23	29
24	5
25	11
26	7
27	13
28	5
29	17
30	7
31	5
32	11
33	31
34	5
35	7
36	23
37	5
38	19
39	7
40	5
41	29
42	13
43	5
44	11
45	5
46	7
47	5
48	23
49	13
50	7
51	5
52	5
53	7
54	43
55	5
56	11
57	17
58	7
59	19
60	5
61	23
62	5
63	11
64	13
65	5
66	41
67	7
68	47
69	17
70	5
71	31
72	11
73	7
74	5
75	13
76	29
77	5
78	7
79	23
80	37
81	11
82	5
83	17
84	7
85	13
86	5
87	43
88	19
89	5
90	5
91	7
92	17
93	5
94	11

n	a(n)
1	7
2	5
3	11
4	5
5	13
6	5
7	7
8	11
9	5
10	17
11	7
12	5
13	13
14	11
15	5
16	7
17	19
18	5
19	7
20	17
21	5
22	5
23	29
24	5
25	11
26	7
27	13
28	5
29	17
30	7
31	5
32	11
33	31
34	5
35	7
36	23
37	5
38	19
39	7
40	5
41	29
42	13
43	5
44	11
45	5
46	7
47	5
48	23
49	13
50	7
51	5
52	5
53	7
54	43
55	5
56	11
57	17
58	7
59	19
60	5
61	23
62	5
63	11
64	13
65	5
66	41
67	7
68	47
69	17
70	5
71	31
72	11
73	7
74	5
75	13
76	29
77	5
78	7
79	23
80	37
81	11
82	5
83	17
84	7
85	13
86	5
87	43
88	19
89	5
90	5
91	7
92	17
93	5
94	11

n	a(n)
1	7
2	5
3	11
4	5
5	13
6	5
7	7
8	11
9	5
10	17
11	7
12	5
13	13
14	11
15	5
16	7
17	19
18	5
19	7
20	17
21	5
22	5
23	29
24	5
25	11
26	7
27	13
28	5
29	17
30	7
31	5
32	11
33	31
34	5
35	7
36	23
37	5
38	19
39	7
40	5
41	29
42	13
43	5
44	11
45	5
46	7
47	5
48	23
49	13
50	7
51	5
52	5
53	7
54	43
55	5
56	11
57	17
58	7
59	19
60	5
61	23
62	5
63	11
64	13
65	5
66	41
67	7
68	47
69	17
70	5
71	31
72	11
73	7
74	5
75	13
76	29
77	5
78	7
79	23
80	37
81	11
82	5
83	17
84	7
85	13
86	5
87	43
88	19
89	5
90	5
91	7
92	17
93	5
94	11