A374336 - cp's OEIS frontend

A374336 a(n) is the numerator of x(n) = (2*x(n-1) + c(n)) mod 1, where c(n) = 1/n if n is a power of 3 and 0 otherwise, with x(0) = 0.

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

[0, 0, 0, 1, 2, 1, 2, 1, 2, 4, 8, 7, 5, 1, 2, 4, 8, 7, 5, 1, 2, 4, 8, 7, 5, 1, 2, 13, 26, 25, 23, 19, 11, 22, 17, 7, 14, 1, 2, 4, 8, 16, 5, 10, 20, 13, 26, 25, 23, 19, 11, 22, 17, 7, 14, 1, 2, 4, 8, 16, 5, 10, 20, 13, 26, 25, 23, 19, 11, 22, 17, 7, 14, 1, 2, 4]

cp's OEIS Frontend

A374336 a(n) is the numerator of x(n) = (2*x(n-1) + c(n)) mod 1, where c(n) = 1/n if n is a power of 3 and 0 otherwise, with x(0) = 0.

Table of values

List of values

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

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

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