A163178 - cp's OEIS frontend

A163178 a(n) is the central prime factor of A046339(n).

n	a(n)
1	2
2	2
3	3
4	2
5	3
6	2
7	3
8	2
9	3
10	2
11	3
12	2
13	5
14	2
15	3
16	3
17	2
18	5
19	2
20	5
21	2
22	3
23	2
24	2
25	7
26	3
27	3
28	5
29	3
30	5
31	2
32	3
33	2
34	3
35	2
36	2
37	5
38	2
39	5
40	3
41	7
42	2
43	3
44	7
45	3
46	2
47	5
48	2
49	5
50	3
51	2
52	3
53	5
54	2
55	3
56	7
57	3
58	2
59	5
60	2
61	5
62	2
63	3
64	2
65	2
66	3
67	5
68	7
69	2
70	7
71	11
72	3
73	2
74	7
75	3
76	3
77	5
78	3
79	3
80	2
81	7
82	2
83	3
84	2
85	7
86	5
87	3
88	2
89	3
90	2
91	5
92	11
93	2
94	5
95	2
96	3
97	2
98	5
99	2
100	2
101	3
102	2
103	7
104	5

[2, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 5, 2, 3, 3, 2, 5, 2, 5, 2, 3, 2, 2, 7, 3, 3, 5, 3, 5, 2, 3, 2, 3, 2, 2, 5, 2, 5, 3, 7, 2, 3, 7, 3, 2, 5, 2, 5, 3, 2, 3, 5, 2, 3, 7, 3, 2, 5, 2, 5, 2, 3, 2, 2, 3, 5, 7, 2, 7, 11, 3, 2, 7, 3, 3, 5, 3, 3, 2, 7, 2, 3, 2, 7, 5, 3, 2, 3, 2, 5, 11, 2, 5, 2, 3, 2, 5, 2, 2, 3, 2, 7, 5]

cp's OEIS Frontend

A163178 a(n) is the central prime factor of A046339(n).

Table of values

List of values

n	a(n)
1	2
2	2
3	3
4	2
5	3
6	2
7	3
8	2
9	3
10	2
11	3
12	2
13	5
14	2
15	3
16	3
17	2
18	5
19	2
20	5
21	2
22	3
23	2
24	2
25	7
26	3
27	3
28	5
29	3
30	5
31	2
32	3
33	2
34	3
35	2
36	2
37	5
38	2
39	5
40	3
41	7
42	2
43	3
44	7
45	3
46	2
47	5
48	2
49	5
50	3
51	2
52	3
53	5
54	2
55	3
56	7
57	3
58	2
59	5
60	2
61	5
62	2
63	3
64	2
65	2
66	3
67	5
68	7
69	2
70	7
71	11
72	3
73	2
74	7
75	3
76	3
77	5
78	3
79	3
80	2
81	7
82	2
83	3
84	2
85	7
86	5
87	3
88	2
89	3
90	2
91	5
92	11
93	2
94	5
95	2
96	3
97	2
98	5
99	2
100	2
101	3
102	2
103	7
104	5

n	a(n)
1	2
2	2
3	3
4	2
5	3
6	2
7	3
8	2
9	3
10	2
11	3
12	2
13	5
14	2
15	3
16	3
17	2
18	5
19	2
20	5
21	2
22	3
23	2
24	2
25	7
26	3
27	3
28	5
29	3
30	5
31	2
32	3
33	2
34	3
35	2
36	2
37	5
38	2
39	5
40	3
41	7
42	2
43	3
44	7
45	3
46	2
47	5
48	2
49	5
50	3
51	2
52	3
53	5
54	2
55	3
56	7
57	3
58	2
59	5
60	2
61	5
62	2
63	3
64	2
65	2
66	3
67	5
68	7
69	2
70	7
71	11
72	3
73	2
74	7
75	3
76	3
77	5
78	3
79	3
80	2
81	7
82	2
83	3
84	2
85	7
86	5
87	3
88	2
89	3
90	2
91	5
92	11
93	2
94	5
95	2
96	3
97	2
98	5
99	2
100	2
101	3
102	2
103	7
104	5

n	a(n)
1	2
2	2
3	3
4	2
5	3
6	2
7	3
8	2
9	3
10	2
11	3
12	2
13	5
14	2
15	3
16	3
17	2
18	5
19	2
20	5
21	2
22	3
23	2
24	2
25	7
26	3
27	3
28	5
29	3
30	5
31	2
32	3
33	2
34	3
35	2
36	2
37	5
38	2
39	5
40	3
41	7
42	2
43	3
44	7
45	3
46	2
47	5
48	2
49	5
50	3
51	2
52	3
53	5
54	2
55	3
56	7
57	3
58	2
59	5
60	2
61	5
62	2
63	3
64	2
65	2
66	3
67	5
68	7
69	2
70	7
71	11
72	3
73	2
74	7
75	3
76	3
77	5
78	3
79	3
80	2
81	7
82	2
83	3
84	2
85	7
86	5
87	3
88	2
89	3
90	2
91	5
92	11
93	2
94	5
95	2
96	3
97	2
98	5
99	2
100	2
101	3
102	2
103	7
104	5