A098115 - cp's OEIS frontend

A098115 a(n) is the length of iteration trajectory when the cototient function (A051953) is applied to the half of the n-th primorial number (A070826(n) = A002110(n)/2).

n	a(n)
1	2
2	3
3	4
4	7
5	10
6	5
7	12
8	15
9	12
10	28
11	6
12	6
13	31
14	12
15	47
16	29
17	23
18	32
19	33
20	24
21	40
22	28
23	12
24	35
25	34
26	56
27	17
28	36
29	40
30	123
31	57
32	61
33	9
34	99
35	94
36	132
37	158
38	172
39	23
40	43
41	89
42	186
43	196
44	194
45	203
46	157
47	205
48	62
49	32
50	26
51	76
52	105
53	65
54	45
55	177
56	56
57	278

[2, 3, 4, 7, 10, 5, 12, 15, 12, 28, 6, 6, 31, 12, 47, 29, 23, 32, 33, 24, 40, 28, 12, 35, 34, 56, 17, 36, 40, 123, 57, 61, 9, 99, 94, 132, 158, 172, 23, 43, 89, 186, 196, 194, 203, 157, 205, 62, 32, 26, 76, 105, 65, 45, 177, 56, 278]

cp's OEIS Frontend

A098115 a(n) is the length of iteration trajectory when the cototient function (A051953) is applied to the half of the n-th primorial number (A070826(n) = A002110(n)/2).

Table of values

List of values

n	a(n)
1	2
2	3
3	4
4	7
5	10
6	5
7	12
8	15
9	12
10	28
11	6
12	6
13	31
14	12
15	47
16	29
17	23
18	32
19	33
20	24
21	40
22	28
23	12
24	35
25	34
26	56
27	17
28	36
29	40
30	123
31	57
32	61
33	9
34	99
35	94
36	132
37	158
38	172
39	23
40	43
41	89
42	186
43	196
44	194
45	203
46	157
47	205
48	62
49	32
50	26
51	76
52	105
53	65
54	45
55	177
56	56
57	278

n	a(n)
1	2
2	3
3	4
4	7
5	10
6	5
7	12
8	15
9	12
10	28
11	6
12	6
13	31
14	12
15	47
16	29
17	23
18	32
19	33
20	24
21	40
22	28
23	12
24	35
25	34
26	56
27	17
28	36
29	40
30	123
31	57
32	61
33	9
34	99
35	94
36	132
37	158
38	172
39	23
40	43
41	89
42	186
43	196
44	194
45	203
46	157
47	205
48	62
49	32
50	26
51	76
52	105
53	65
54	45
55	177
56	56
57	278

n	a(n)
1	2
2	3
3	4
4	7
5	10
6	5
7	12
8	15
9	12
10	28
11	6
12	6
13	31
14	12
15	47
16	29
17	23
18	32
19	33
20	24
21	40
22	28
23	12
24	35
25	34
26	56
27	17
28	36
29	40
30	123
31	57
32	61
33	9
34	99
35	94
36	132
37	158
38	172
39	23
40	43
41	89
42	186
43	196
44	194
45	203
46	157
47	205
48	62
49	32
50	26
51	76
52	105
53	65
54	45
55	177
56	56
57	278