A334942 - cp's OEIS frontend

A334942 a(1) = 1, a(n) = a(n-1) / gcd(a(n-1),n) if this gcd is > 1, else a(n) = 2*a(n-1) + 4.

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

[1, 6, 2, 1, 6, 1, 6, 3, 1, 6, 16, 4, 12, 6, 2, 1, 6, 1, 6, 3, 1, 6, 16, 2, 8, 4, 12, 3, 10, 1, 6, 3, 1, 6, 16, 4, 12, 6, 2, 1, 6, 1, 6, 3, 1, 6, 16, 1, 6, 3, 1, 6, 16, 8, 20, 5, 14, 7, 18, 3, 10, 5, 14, 7, 18, 3, 10, 5, 14, 1, 6, 1, 6, 3, 1, 6, 16, 8, 20, 1, 6]

cp's OEIS Frontend

A334942 a(1) = 1, a(n) = a(n-1) / gcd(a(n-1),n) if this gcd is > 1, else a(n) = 2*a(n-1) + 4.

Table of values

List of values

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

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

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