A369456 - cp's OEIS frontend

A369456 a(n) = A083345(A005940(1+n)), where A083345(n) = (n'/gcd(n,n')), n' means the arithmetic derivative of n (A003415), and A005940 is the Doudna-sequence.

n	a(n)
0	0
1	1
2	1
3	1
4	1
5	5
6	2
7	3
8	1
9	7
10	8
11	4
12	2
13	7
14	1
15	2
16	1
17	9
18	10
19	6
20	12
21	31
22	13
23	11
24	2
25	9
26	11
27	5
28	3
29	3
30	4
31	5
32	1
33	13
34	14
35	8
36	16
37	41
38	17
39	17
40	18
41	59
42	71
43	23
44	19
45	41
46	6
47	7
48	2
49	11
50	13
51	7
52	17
53	37
54	16
55	13
56	3
57	11
58	14
59	2
60	4
61	11
62	5
63	3
64	1
65	15
66	16
67	12
68	18
69	61
70	25
71	23
72	20
73	87
74	103
75	31
76	27
77	55
78	8
79	11
80	24
81	113
82	131
83	47
84	167
85	247
86	106
87	61

[0, 1, 1, 1, 1, 5, 2, 3, 1, 7, 8, 4, 2, 7, 1, 2, 1, 9, 10, 6, 12, 31, 13, 11, 2, 9, 11, 5, 3, 3, 4, 5, 1, 13, 14, 8, 16, 41, 17, 17, 18, 59, 71, 23, 19, 41, 6, 7, 2, 11, 13, 7, 17, 37, 16, 13, 3, 11, 14, 2, 4, 11, 5, 3, 1, 15, 16, 12, 18, 61, 25, 23, 20, 87, 103, 31, 27, 55, 8, 11, 24, 113, 131, 47, 167, 247, 106, 61]

cp's OEIS Frontend

A369456 a(n) = A083345(A005940(1+n)), where A083345(n) = (n'/gcd(n,n')), n' means the arithmetic derivative of n (A003415), and A005940 is the Doudna-sequence.

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	1
4	1
5	5
6	2
7	3
8	1
9	7
10	8
11	4
12	2
13	7
14	1
15	2
16	1
17	9
18	10
19	6
20	12
21	31
22	13
23	11
24	2
25	9
26	11
27	5
28	3
29	3
30	4
31	5
32	1
33	13
34	14
35	8
36	16
37	41
38	17
39	17
40	18
41	59
42	71
43	23
44	19
45	41
46	6
47	7
48	2
49	11
50	13
51	7
52	17
53	37
54	16
55	13
56	3
57	11
58	14
59	2
60	4
61	11
62	5
63	3
64	1
65	15
66	16
67	12
68	18
69	61
70	25
71	23
72	20
73	87
74	103
75	31
76	27
77	55
78	8
79	11
80	24
81	113
82	131
83	47
84	167
85	247
86	106
87	61

n	a(n)
0	0
1	1
2	1
3	1
4	1
5	5
6	2
7	3
8	1
9	7
10	8
11	4
12	2
13	7
14	1
15	2
16	1
17	9
18	10
19	6
20	12
21	31
22	13
23	11
24	2
25	9
26	11
27	5
28	3
29	3
30	4
31	5
32	1
33	13
34	14
35	8
36	16
37	41
38	17
39	17
40	18
41	59
42	71
43	23
44	19
45	41
46	6
47	7
48	2
49	11
50	13
51	7
52	17
53	37
54	16
55	13
56	3
57	11
58	14
59	2
60	4
61	11
62	5
63	3
64	1
65	15
66	16
67	12
68	18
69	61
70	25
71	23
72	20
73	87
74	103
75	31
76	27
77	55
78	8
79	11
80	24
81	113
82	131
83	47
84	167
85	247
86	106
87	61

n	a(n)
0	0
1	1
2	1
3	1
4	1
5	5
6	2
7	3
8	1
9	7
10	8
11	4
12	2
13	7
14	1
15	2
16	1
17	9
18	10
19	6
20	12
21	31
22	13
23	11
24	2
25	9
26	11
27	5
28	3
29	3
30	4
31	5
32	1
33	13
34	14
35	8
36	16
37	41
38	17
39	17
40	18
41	59
42	71
43	23
44	19
45	41
46	6
47	7
48	2
49	11
50	13
51	7
52	17
53	37
54	16
55	13
56	3
57	11
58	14
59	2
60	4
61	11
62	5
63	3
64	1
65	15
66	16
67	12
68	18
69	61
70	25
71	23
72	20
73	87
74	103
75	31
76	27
77	55
78	8
79	11
80	24
81	113
82	131
83	47
84	167
85	247
86	106
87	61