A300233 - cp's OEIS frontend

A300233 Filter sequence combining A051953(n) and A009194(n), cototient of n and gcd(n,sigma(n)).

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

[1, 2, 2, 3, 2, 4, 2, 5, 6, 7, 2, 8, 2, 9, 10, 11, 2, 12, 2, 13, 14, 13, 2, 15, 16, 17, 14, 18, 2, 19, 2, 20, 21, 22, 23, 24, 2, 25, 26, 27, 2, 28, 2, 29, 30, 31, 2, 32, 33, 34, 35, 36, 2, 37, 26, 38, 39, 40, 2, 41, 2, 42, 43, 44, 45, 46, 2, 47, 48, 49, 2, 50, 2, 51, 52, 53, 45, 54, 2, 55, 43, 56, 2, 57, 39, 58, 59, 60, 2, 61, 62, 60, 63, 55, 64, 65, 2, 66]

cp's OEIS Frontend

A300233 Filter sequence combining A051953(n) and A009194(n), cototient of n and gcd(n,sigma(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	6
10	7
11	2
12	8
13	2
14	9
15	10
16	11
17	2
18	12
19	2
20	13
21	14
22	13
23	2
24	15
25	16
26	17
27	14
28	18
29	2
30	19
31	2
32	20
33	21
34	22
35	23
36	24
37	2
38	25
39	26
40	27
41	2
42	28
43	2
44	29
45	30
46	31
47	2
48	32
49	33
50	34
51	35
52	36
53	2
54	37
55	26
56	38
57	39
58	40
59	2
60	41
61	2
62	42
63	43
64	44
65	45
66	46
67	2
68	47
69	48
70	49
71	2
72	50
73	2
74	51
75	52
76	53
77	45
78	54
79	2
80	55
81	43
82	56
83	2
84	57
85	39
86	58
87	59
88	60
89	2
90	61
91	62
92	60
93	63
94	55
95	64
96	65
97	2
98	66

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

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