A110091 - cp's OEIS frontend

A110091 Denominators of sequence of rationals defined by r(n) = n for n<=1 and for n>1: r(n) = (sum of denominators of r(n-1) and r(n-2))/(sum of numerators of r(n-1) and r(n-2)).

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

[1, 1, 1, 3, 1, 3, 5, 1, 5, 7, 1, 7, 9, 1, 9, 11, 1, 11, 13, 1, 13, 15, 1, 15, 17, 1, 17, 19, 1, 19, 21, 1, 21, 23, 1, 23, 25, 1, 25, 27, 1, 27, 29, 1, 29, 31, 1, 31, 33, 1, 33, 35, 1, 35, 37, 1, 37, 39, 1, 39, 41, 1, 41, 43, 1, 43, 45, 1, 45, 47, 1, 47, 49, 1, 49, 51, 1, 51, 53, 1, 53, 55]

cp's OEIS Frontend

A110091 Denominators of sequence of rationals defined by r(n) = n for n<=1 and for n>1: r(n) = (sum of denominators of r(n-1) and r(n-2))/(sum of numerators of r(n-1) and r(n-2)).

Table of values

List of values

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

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

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