A118663 - cp's OEIS frontend

A118663 Index of the least prime dividing the n-th composite number: A000720(A020639(A002808(n))).

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	2
9	1
10	1
11	1
12	2
13	1
14	1
15	3
16	1
17	2
18	1
19	1
20	1
21	2
22	1
23	3
24	1
25	1
26	2
27	1
28	1
29	1
30	2
31	1
32	1
33	4
34	1
35	2
36	1
37	1
38	3
39	1
40	2
41	1
42	1
43	1
44	2
45	1
46	3
47	1
48	1
49	2
50	1
51	1
52	1
53	2
54	1
55	4
56	1
57	1
58	2
59	1
60	1
61	3
62	1
63	2
64	1
65	1
66	4
67	1
68	2
69	1
70	3
71	1
72	1
73	2
74	1
75	1
76	1
77	2
78	1
79	1
80	1
81	2
82	1
83	1
84	3
85	1
86	2
87	1
88	4
89	1
90	5
91	1
92	2
93	1
94	3
95	1
96	1
97	2
98	1
99	1
100	4
101	1
102	2
103	1
104	1
105	1
106	2

[1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 3, 1, 2, 1, 1, 1, 2, 1, 3, 1, 1, 2, 1, 1, 1, 2, 1, 1, 4, 1, 2, 1, 1, 3, 1, 2, 1, 1, 1, 2, 1, 3, 1, 1, 2, 1, 1, 1, 2, 1, 4, 1, 1, 2, 1, 1, 3, 1, 2, 1, 1, 4, 1, 2, 1, 3, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 3, 1, 2, 1, 4, 1, 5, 1, 2, 1, 3, 1, 1, 2, 1, 1, 4, 1, 2, 1, 1, 1, 2]

cp's OEIS Frontend

A118663 Index of the least prime dividing the n-th composite number: A000720(A020639(A002808(n))).

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	2
9	1
10	1
11	1
12	2
13	1
14	1
15	3
16	1
17	2
18	1
19	1
20	1
21	2
22	1
23	3
24	1
25	1
26	2
27	1
28	1
29	1
30	2
31	1
32	1
33	4
34	1
35	2
36	1
37	1
38	3
39	1
40	2
41	1
42	1
43	1
44	2
45	1
46	3
47	1
48	1
49	2
50	1
51	1
52	1
53	2
54	1
55	4
56	1
57	1
58	2
59	1
60	1
61	3
62	1
63	2
64	1
65	1
66	4
67	1
68	2
69	1
70	3
71	1
72	1
73	2
74	1
75	1
76	1
77	2
78	1
79	1
80	1
81	2
82	1
83	1
84	3
85	1
86	2
87	1
88	4
89	1
90	5
91	1
92	2
93	1
94	3
95	1
96	1
97	2
98	1
99	1
100	4
101	1
102	2
103	1
104	1
105	1
106	2

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	2
9	1
10	1
11	1
12	2
13	1
14	1
15	3
16	1
17	2
18	1
19	1
20	1
21	2
22	1
23	3
24	1
25	1
26	2
27	1
28	1
29	1
30	2
31	1
32	1
33	4
34	1
35	2
36	1
37	1
38	3
39	1
40	2
41	1
42	1
43	1
44	2
45	1
46	3
47	1
48	1
49	2
50	1
51	1
52	1
53	2
54	1
55	4
56	1
57	1
58	2
59	1
60	1
61	3
62	1
63	2
64	1
65	1
66	4
67	1
68	2
69	1
70	3
71	1
72	1
73	2
74	1
75	1
76	1
77	2
78	1
79	1
80	1
81	2
82	1
83	1
84	3
85	1
86	2
87	1
88	4
89	1
90	5
91	1
92	2
93	1
94	3
95	1
96	1
97	2
98	1
99	1
100	4
101	1
102	2
103	1
104	1
105	1
106	2

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	2
9	1
10	1
11	1
12	2
13	1
14	1
15	3
16	1
17	2
18	1
19	1
20	1
21	2
22	1
23	3
24	1
25	1
26	2
27	1
28	1
29	1
30	2
31	1
32	1
33	4
34	1
35	2
36	1
37	1
38	3
39	1
40	2
41	1
42	1
43	1
44	2
45	1
46	3
47	1
48	1
49	2
50	1
51	1
52	1
53	2
54	1
55	4
56	1
57	1
58	2
59	1
60	1
61	3
62	1
63	2
64	1
65	1
66	4
67	1
68	2
69	1
70	3
71	1
72	1
73	2
74	1
75	1
76	1
77	2
78	1
79	1
80	1
81	2
82	1
83	1
84	3
85	1
86	2
87	1
88	4
89	1
90	5
91	1
92	2
93	1
94	3
95	1
96	1
97	2
98	1
99	1
100	4
101	1
102	2
103	1
104	1
105	1
106	2