A319345 - cp's OEIS frontend

A319345 Filter sequence combining the prime signature of phi(d) from all divisors d > 1 of n.

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

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 7, 11, 12, 13, 14, 15, 16, 17, 12, 18, 19, 13, 7, 20, 21, 22, 19, 23, 12, 24, 25, 26, 19, 27, 28, 29, 30, 22, 31, 32, 33, 34, 25, 23, 35, 13, 7, 36, 37, 38, 39, 40, 12, 34, 28, 41, 42, 22, 7, 43, 44, 45, 46, 47, 48, 34, 25, 49, 19, 50, 25, 51, 52, 53, 54, 55, 56, 57, 25, 58, 59, 60, 7, 61, 62, 45, 31, 41, 33, 63, 64, 23, 65, 13]

cp's OEIS Frontend

A319345 Filter sequence combining the prime signature of phi(d) from all divisors d > 1 of n.

Table of values

List of values

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

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

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