A305891 - cp's OEIS frontend

A305891 Filter sequence combining 2-adic valuation (A007814) and the prime signature (A046523) of n.

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

[1, 2, 3, 4, 3, 5, 3, 6, 7, 5, 3, 8, 3, 5, 9, 10, 3, 11, 3, 8, 9, 5, 3, 12, 7, 5, 13, 8, 3, 14, 3, 15, 9, 5, 9, 16, 3, 5, 9, 12, 3, 14, 3, 8, 17, 5, 3, 18, 7, 11, 9, 8, 3, 19, 9, 12, 9, 5, 3, 20, 3, 5, 17, 21, 9, 14, 3, 8, 9, 14, 3, 22, 3, 5, 17, 8, 9, 14, 3, 18, 23, 5, 3, 20, 9, 5, 9, 12, 3, 24, 9, 8, 9, 5, 9, 25, 3, 11, 17, 16, 3, 14, 3, 12, 26, 5, 3, 27, 3]

cp's OEIS Frontend

A305891 Filter sequence combining 2-adic valuation (A007814) and the prime signature (A046523) of n.

Table of values

List of values

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

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

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