A087040 - cp's OEIS frontend

A087040 2nd largest prime factor of n-th composite number.

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

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

cp's OEIS Frontend

A087040 2nd largest prime factor of n-th composite number.

Table of values

List of values

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

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

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