A370454 - cp's OEIS frontend

A370454 a(n) = 1 + ceiling((log q)/(log p)), where p = A020639(s) and q = A119288(s) is the second smallest distinct prime factor of squarefree composite s = A120944(n).

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

[3, 4, 4, 3, 3, 5, 5, 3, 4, 6, 3, 6, 4, 3, 6, 4, 3, 4, 6, 6, 3, 3, 4, 4, 7, 3, 3, 7, 3, 7, 5, 3, 5, 7, 3, 3, 3, 7, 4, 5, 3, 3, 7, 3, 7, 5, 5, 4, 3, 8, 3, 5, 8, 3, 4, 8, 4, 4, 8, 5, 3, 3, 8, 4, 3, 5, 8, 4, 5, 4, 3, 3, 4, 8, 3, 5, 8, 3, 4, 8, 3, 3, 5, 8, 4, 3, 8]

cp's OEIS Frontend

A370454 a(n) = 1 + ceiling((log q)/(log p)), where p = A020639(s) and q = A119288(s) is the second smallest distinct prime factor of squarefree composite s = A120944(n).

Table of values

List of values

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

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

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