A261179 - cp's OEIS frontend

A261179 Take the list of positive rationals {R(n): n>=1} in the order defined by Calkin and Wilf (Recounting the Rationals, 1999); a(n) = numerator of R(prime(n)).

n	a(n)
1	1
2	2
3	3
4	3
5	5
6	5
7	5
8	7
9	7
10	7
11	5
12	11
13	11
14	13
15	9
16	13
17	11
18	9
19	11
20	13
21	15
22	13
23	19
24	17
25	11
26	19
27	17
28	21
29	19
30	13
31	7
32	13
33	19
34	23
35	29
36	25
37	23
38	25
39	27
40	31
41	29
42	31
43	13
44	13
45	25
46	23
47	31
48	17
49	23
50	27
51	25
52	19
53	17
54	17
55	9
56	19
57	27
58	21
59	37
60	31
61	35
62	41
63	41
64	37
65	33
66	29
67	49
68	37
69	49
70	41
71	27
72	41
73	33
74	41
75	31
76	15
77	31
78	39
79	33
80	41
81	41
82	49
83	37
84	35
85	41
86	39
87	19
88	37
89	41
90	31
91	43
92	23
93	31
94	37
95	27
96	23
97	15
98	27

[1, 2, 3, 3, 5, 5, 5, 7, 7, 7, 5, 11, 11, 13, 9, 13, 11, 9, 11, 13, 15, 13, 19, 17, 11, 19, 17, 21, 19, 13, 7, 13, 19, 23, 29, 25, 23, 25, 27, 31, 29, 31, 13, 13, 25, 23, 31, 17, 23, 27, 25, 19, 17, 17, 9, 19, 27, 21, 37, 31, 35, 41, 41, 37, 33, 29, 49, 37, 49, 41, 27, 41, 33, 41, 31, 15, 31, 39, 33, 41, 41, 49, 37, 35, 41, 39, 19, 37, 41, 31, 43, 23, 31, 37, 27, 23, 15, 27]

cp's OEIS Frontend

A261179 Take the list of positive rationals {R(n): n>=1} in the order defined by Calkin and Wilf (Recounting the Rationals, 1999); a(n) = numerator of R(prime(n)).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	3
5	5
6	5
7	5
8	7
9	7
10	7
11	5
12	11
13	11
14	13
15	9
16	13
17	11
18	9
19	11
20	13
21	15
22	13
23	19
24	17
25	11
26	19
27	17
28	21
29	19
30	13
31	7
32	13
33	19
34	23
35	29
36	25
37	23
38	25
39	27
40	31
41	29
42	31
43	13
44	13
45	25
46	23
47	31
48	17
49	23
50	27
51	25
52	19
53	17
54	17
55	9
56	19
57	27
58	21
59	37
60	31
61	35
62	41
63	41
64	37
65	33
66	29
67	49
68	37
69	49
70	41
71	27
72	41
73	33
74	41
75	31
76	15
77	31
78	39
79	33
80	41
81	41
82	49
83	37
84	35
85	41
86	39
87	19
88	37
89	41
90	31
91	43
92	23
93	31
94	37
95	27
96	23
97	15
98	27

n	a(n)
1	1
2	2
3	3
4	3
5	5
6	5
7	5
8	7
9	7
10	7
11	5
12	11
13	11
14	13
15	9
16	13
17	11
18	9
19	11
20	13
21	15
22	13
23	19
24	17
25	11
26	19
27	17
28	21
29	19
30	13
31	7
32	13
33	19
34	23
35	29
36	25
37	23
38	25
39	27
40	31
41	29
42	31
43	13
44	13
45	25
46	23
47	31
48	17
49	23
50	27
51	25
52	19
53	17
54	17
55	9
56	19
57	27
58	21
59	37
60	31
61	35
62	41
63	41
64	37
65	33
66	29
67	49
68	37
69	49
70	41
71	27
72	41
73	33
74	41
75	31
76	15
77	31
78	39
79	33
80	41
81	41
82	49
83	37
84	35
85	41
86	39
87	19
88	37
89	41
90	31
91	43
92	23
93	31
94	37
95	27
96	23
97	15
98	27

n	a(n)
1	1
2	2
3	3
4	3
5	5
6	5
7	5
8	7
9	7
10	7
11	5
12	11
13	11
14	13
15	9
16	13
17	11
18	9
19	11
20	13
21	15
22	13
23	19
24	17
25	11
26	19
27	17
28	21
29	19
30	13
31	7
32	13
33	19
34	23
35	29
36	25
37	23
38	25
39	27
40	31
41	29
42	31
43	13
44	13
45	25
46	23
47	31
48	17
49	23
50	27
51	25
52	19
53	17
54	17
55	9
56	19
57	27
58	21
59	37
60	31
61	35
62	41
63	41
64	37
65	33
66	29
67	49
68	37
69	49
70	41
71	27
72	41
73	33
74	41
75	31
76	15
77	31
78	39
79	33
80	41
81	41
82	49
83	37
84	35
85	41
86	39
87	19
88	37
89	41
90	31
91	43
92	23
93	31
94	37
95	27
96	23
97	15
98	27