A284257 - cp's OEIS frontend

A284257 a(n) = number of prime factors of n that are < the square of smallest prime factor of n (counted with multiplicity), a(1) = 0.

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	2
10	1
11	1
12	3
13	1
14	1
15	2
16	4
17	1
18	3
19	1
20	2
21	2
22	1
23	1
24	4
25	2
26	1
27	3
28	2
29	1
30	2
31	1
32	5
33	1
34	1
35	2
36	4
37	1
38	1
39	1
40	3
41	1
42	2
43	1
44	2
45	3
46	1
47	1
48	5
49	2
50	1
51	1
52	2
53	1
54	4
55	2
56	3
57	1
58	1
59	1
60	3
61	1
62	1
63	3
64	6
65	2
66	2
67	1
68	2
69	1
70	1
71	1
72	5
73	1
74	1
75	3
76	2
77	2
78	2
79	1
80	4
81	4
82	1
83	1
84	3
85	2
86	1
87	1
88	3
89	1
90	3
91	2
92	2
93	1
94	1
95	2
96	6
97	1
98	1
99	2
100	2
101	1
102	2
103	1
104	3
105	3
106	1
107	1
108	5
109	1
110	1
111	1
112	4
113	1
114	2
115	2
116	2
117	2
118	1
119	2
120	4

[0, 1, 1, 2, 1, 2, 1, 3, 2, 1, 1, 3, 1, 1, 2, 4, 1, 3, 1, 2, 2, 1, 1, 4, 2, 1, 3, 2, 1, 2, 1, 5, 1, 1, 2, 4, 1, 1, 1, 3, 1, 2, 1, 2, 3, 1, 1, 5, 2, 1, 1, 2, 1, 4, 2, 3, 1, 1, 1, 3, 1, 1, 3, 6, 2, 2, 1, 2, 1, 1, 1, 5, 1, 1, 3, 2, 2, 2, 1, 4, 4, 1, 1, 3, 2, 1, 1, 3, 1, 3, 2, 2, 1, 1, 2, 6, 1, 1, 2, 2, 1, 2, 1, 3, 3, 1, 1, 5, 1, 1, 1, 4, 1, 2, 2, 2, 2, 1, 2, 4]

cp's OEIS Frontend

A284257 a(n) = number of prime factors of n that are < the square of smallest prime factor of n (counted with multiplicity), a(1) = 0.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	2
10	1
11	1
12	3
13	1
14	1
15	2
16	4
17	1
18	3
19	1
20	2
21	2
22	1
23	1
24	4
25	2
26	1
27	3
28	2
29	1
30	2
31	1
32	5
33	1
34	1
35	2
36	4
37	1
38	1
39	1
40	3
41	1
42	2
43	1
44	2
45	3
46	1
47	1
48	5
49	2
50	1
51	1
52	2
53	1
54	4
55	2
56	3
57	1
58	1
59	1
60	3
61	1
62	1
63	3
64	6
65	2
66	2
67	1
68	2
69	1
70	1
71	1
72	5
73	1
74	1
75	3
76	2
77	2
78	2
79	1
80	4
81	4
82	1
83	1
84	3
85	2
86	1
87	1
88	3
89	1
90	3
91	2
92	2
93	1
94	1
95	2
96	6
97	1
98	1
99	2
100	2
101	1
102	2
103	1
104	3
105	3
106	1
107	1
108	5
109	1
110	1
111	1
112	4
113	1
114	2
115	2
116	2
117	2
118	1
119	2
120	4

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	2
10	1
11	1
12	3
13	1
14	1
15	2
16	4
17	1
18	3
19	1
20	2
21	2
22	1
23	1
24	4
25	2
26	1
27	3
28	2
29	1
30	2
31	1
32	5
33	1
34	1
35	2
36	4
37	1
38	1
39	1
40	3
41	1
42	2
43	1
44	2
45	3
46	1
47	1
48	5
49	2
50	1
51	1
52	2
53	1
54	4
55	2
56	3
57	1
58	1
59	1
60	3
61	1
62	1
63	3
64	6
65	2
66	2
67	1
68	2
69	1
70	1
71	1
72	5
73	1
74	1
75	3
76	2
77	2
78	2
79	1
80	4
81	4
82	1
83	1
84	3
85	2
86	1
87	1
88	3
89	1
90	3
91	2
92	2
93	1
94	1
95	2
96	6
97	1
98	1
99	2
100	2
101	1
102	2
103	1
104	3
105	3
106	1
107	1
108	5
109	1
110	1
111	1
112	4
113	1
114	2
115	2
116	2
117	2
118	1
119	2
120	4

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	2
10	1
11	1
12	3
13	1
14	1
15	2
16	4
17	1
18	3
19	1
20	2
21	2
22	1
23	1
24	4
25	2
26	1
27	3
28	2
29	1
30	2
31	1
32	5
33	1
34	1
35	2
36	4
37	1
38	1
39	1
40	3
41	1
42	2
43	1
44	2
45	3
46	1
47	1
48	5
49	2
50	1
51	1
52	2
53	1
54	4
55	2
56	3
57	1
58	1
59	1
60	3
61	1
62	1
63	3
64	6
65	2
66	2
67	1
68	2
69	1
70	1
71	1
72	5
73	1
74	1
75	3
76	2
77	2
78	2
79	1
80	4
81	4
82	1
83	1
84	3
85	2
86	1
87	1
88	3
89	1
90	3
91	2
92	2
93	1
94	1
95	2
96	6
97	1
98	1
99	2
100	2
101	1
102	2
103	1
104	3
105	3
106	1
107	1
108	5
109	1
110	1
111	1
112	4
113	1
114	2
115	2
116	2
117	2
118	1
119	2
120	4