A300248 - cp's OEIS frontend

A300248 Filter sequence combining A046523(n) and A078898(n), the prime signature of n and the number of times the smallest prime factor of n is the smallest prime factor for numbers <= n.

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

[1, 2, 2, 3, 2, 4, 2, 5, 3, 6, 2, 7, 2, 8, 4, 9, 2, 10, 2, 11, 12, 13, 2, 14, 3, 15, 16, 17, 2, 18, 2, 19, 20, 21, 4, 22, 2, 23, 8, 24, 2, 25, 2, 26, 27, 28, 2, 29, 3, 30, 31, 32, 2, 33, 12, 34, 35, 36, 2, 37, 2, 38, 39, 40, 6, 41, 2, 42, 43, 44, 2, 45, 2, 46, 47, 48, 4, 49, 2, 50, 51, 52, 2, 53, 20, 54, 55, 56, 2, 57, 12, 58, 59, 60, 8, 61, 2, 62, 63, 64, 2]

cp's OEIS Frontend

A300248 Filter sequence combining A046523(n) and A078898(n), the prime signature of n and the number of times the smallest prime factor of n is the smallest prime factor for numbers <= n.

Table of values

List of values

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

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

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