A324395 - cp's OEIS frontend

A324395 a(n) = A017666(A005940(1+n)), where A005940 is the Doudna sequence and A017666(n) = n/gcd(n,sigma(n)).

n	a(n)
0	1
1	2
2	3
3	4
4	5
5	1
6	9
7	8
8	7
9	5
10	5
11	3
12	25
13	6
14	27
15	16
16	11
17	7
18	21
19	10
20	35
21	5
22	15
23	2
24	49
25	50
26	75
27	36
28	125
29	9
30	81
31	32
32	13
33	11
34	11
35	1
36	55
37	7
38	63
39	4
40	77
41	35
42	35
43	5
44	175
45	5
46	9
47	12
48	121
49	98
50	49
51	100
52	245
53	25
54	225
55	24
56	343
57	125
58	125
59	27
60	625
61	54
62	243
63	64
64	17
65	13
66	39
67	11
68	65
69	11
70	33
71	7
72	13
73	55
74	55
75	3
76	275
77	21
78	189
79	40
80	143
81	77
82	77
83	5
84	385
85	35
86	105
87	1
88	539

[1, 2, 3, 4, 5, 1, 9, 8, 7, 5, 5, 3, 25, 6, 27, 16, 11, 7, 21, 10, 35, 5, 15, 2, 49, 50, 75, 36, 125, 9, 81, 32, 13, 11, 11, 1, 55, 7, 63, 4, 77, 35, 35, 5, 175, 5, 9, 12, 121, 98, 49, 100, 245, 25, 225, 24, 343, 125, 125, 27, 625, 54, 243, 64, 17, 13, 39, 11, 65, 11, 33, 7, 13, 55, 55, 3, 275, 21, 189, 40, 143, 77, 77, 5, 385, 35, 105, 1, 539]

cp's OEIS Frontend

A324395 a(n) = A017666(A005940(1+n)), where A005940 is the Doudna sequence and A017666(n) = n/gcd(n,sigma(n)).

Table of values

List of values

n	a(n)
0	1
1	2
2	3
3	4
4	5
5	1
6	9
7	8
8	7
9	5
10	5
11	3
12	25
13	6
14	27
15	16
16	11
17	7
18	21
19	10
20	35
21	5
22	15
23	2
24	49
25	50
26	75
27	36
28	125
29	9
30	81
31	32
32	13
33	11
34	11
35	1
36	55
37	7
38	63
39	4
40	77
41	35
42	35
43	5
44	175
45	5
46	9
47	12
48	121
49	98
50	49
51	100
52	245
53	25
54	225
55	24
56	343
57	125
58	125
59	27
60	625
61	54
62	243
63	64
64	17
65	13
66	39
67	11
68	65
69	11
70	33
71	7
72	13
73	55
74	55
75	3
76	275
77	21
78	189
79	40
80	143
81	77
82	77
83	5
84	385
85	35
86	105
87	1
88	539

n	a(n)
0	1
1	2
2	3
3	4
4	5
5	1
6	9
7	8
8	7
9	5
10	5
11	3
12	25
13	6
14	27
15	16
16	11
17	7
18	21
19	10
20	35
21	5
22	15
23	2
24	49
25	50
26	75
27	36
28	125
29	9
30	81
31	32
32	13
33	11
34	11
35	1
36	55
37	7
38	63
39	4
40	77
41	35
42	35
43	5
44	175
45	5
46	9
47	12
48	121
49	98
50	49
51	100
52	245
53	25
54	225
55	24
56	343
57	125
58	125
59	27
60	625
61	54
62	243
63	64
64	17
65	13
66	39
67	11
68	65
69	11
70	33
71	7
72	13
73	55
74	55
75	3
76	275
77	21
78	189
79	40
80	143
81	77
82	77
83	5
84	385
85	35
86	105
87	1
88	539

n	a(n)
0	1
1	2
2	3
3	4
4	5
5	1
6	9
7	8
8	7
9	5
10	5
11	3
12	25
13	6
14	27
15	16
16	11
17	7
18	21
19	10
20	35
21	5
22	15
23	2
24	49
25	50
26	75
27	36
28	125
29	9
30	81
31	32
32	13
33	11
34	11
35	1
36	55
37	7
38	63
39	4
40	77
41	35
42	35
43	5
44	175
45	5
46	9
47	12
48	121
49	98
50	49
51	100
52	245
53	25
54	225
55	24
56	343
57	125
58	125
59	27
60	625
61	54
62	243
63	64
64	17
65	13
66	39
67	11
68	65
69	11
70	33
71	7
72	13
73	55
74	55
75	3
76	275
77	21
78	189
79	40
80	143
81	77
82	77
83	5
84	385
85	35
86	105
87	1
88	539