A319343 - cp's OEIS frontend

A319343 Filter sequence combining the prime signature of phi(d) from all proper divisors d of n.

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

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

cp's OEIS Frontend

A319343 Filter sequence combining the prime signature of phi(d) from all proper divisors d of 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	4
9	5
10	6
11	2
12	7
13	2
14	8
15	9
16	10
17	2
18	11
19	2
20	12
21	13
22	8
23	2
24	14
25	15
26	16
27	13
28	17
29	2
30	18
31	2
32	19
33	13
34	20
35	21
36	22
37	2
38	16
39	23
40	24
41	2
42	25
43	2
44	17
45	26
46	8
47	2
48	27
49	28
50	29
51	30
52	31
53	2
54	25
55	21
56	32
57	23
58	16
59	2
60	33
61	2
62	34
63	35
64	36
65	37
66	25
67	2
68	38
69	13
70	39
71	2
72	40
73	2
74	41
75	42
76	31
77	43
78	44
79	2
80	45
81	46
82	47
83	2
84	48
85	49
86	34
87	23
88	32
89	2
90	50
91	51
92	17
93	52
94	8
95	37
96	53
97	2
98	54
99	35

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

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