A179738 - cp's OEIS frontend

A179738 a(n) = length of (eventual) period of the sequence defined by s(0) = 1, s(n+1) = odd_part(2n-1 + (s(n) if n odd else s(n)*3)), where odd_part = A000265.

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

[1, 2, 4, 1, 4, 8, 2, 4, 8, 4, 2, 2, 1, 4, 12, 4, 4, 26, 2, 12, 6, 2, 4, 4, 4, 16, 4, 8, 10, 6, 4, 8, 4, 2, 6, 8, 12, 12, 28, 1, 22, 16, 2, 16, 12, 12, 16, 6, 4, 40, 24, 4, 32, 6, 26, 16, 6, 8, 4, 8, 12, 2, 36, 6, 46, 12, 2, 36, 60, 6, 16, 8, 4, 18, 20, 4, 60, 36]

cp's OEIS Frontend

A179738 a(n) = length of (eventual) period of the sequence defined by s(0) = 1, s(n+1) = odd_part(2n-1 + (s(n) if n odd else s(n)*3)), where odd_part = A000265.

Table of values

List of values

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

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

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