A138758 - cp's OEIS frontend

A138758 Index of A001203(n) (continued fraction for Pi) in A000040 (primes), or 0 if A001203(n) is not prime.

n	a(n)
1	2
2	4
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	0
11	2
12	0
13	0
14	1
15	0
16	0
17	1
18	1
19	1
20	1
21	0
22	0
23	1
24	0
25	0
26	0
27	2
28	6
29	0
30	0
31	1
32	0
33	0
34	0
35	0
36	1
37	1
38	0
39	2
40	3
41	0
42	0
43	0
44	0
45	0
46	4
47	0
48	1
49	2
50	4
51	0
52	1
53	0
54	0
55	0
56	0
57	0
58	0
59	2
60	0
61	0
62	0
63	0
64	0
65	1
66	0
67	0
68	0
69	0
70	3
71	1
72	1
73	2
74	0
75	1
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	0
85	1
86	1
87	0
88	0
89	0
90	1
91	0
92	0
93	1
94	0
95	2
96	0
97	1
98	0
99	0
100	0
101	1
102	3
103	0
104	0
105	1

[2, 4, 0, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 2, 6, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 2, 3, 0, 0, 0, 0, 0, 4, 0, 1, 2, 4, 0, 1, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 3, 1, 1, 2, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 2, 0, 1, 0, 0, 0, 1, 3, 0, 0, 1]

cp's OEIS Frontend

A138758 Index of A001203(n) (continued fraction for Pi) in A000040 (primes), or 0 if A001203(n) is not prime.

Table of values

List of values

n	a(n)
1	2
2	4
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	0
11	2
12	0
13	0
14	1
15	0
16	0
17	1
18	1
19	1
20	1
21	0
22	0
23	1
24	0
25	0
26	0
27	2
28	6
29	0
30	0
31	1
32	0
33	0
34	0
35	0
36	1
37	1
38	0
39	2
40	3
41	0
42	0
43	0
44	0
45	0
46	4
47	0
48	1
49	2
50	4
51	0
52	1
53	0
54	0
55	0
56	0
57	0
58	0
59	2
60	0
61	0
62	0
63	0
64	0
65	1
66	0
67	0
68	0
69	0
70	3
71	1
72	1
73	2
74	0
75	1
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	0
85	1
86	1
87	0
88	0
89	0
90	1
91	0
92	0
93	1
94	0
95	2
96	0
97	1
98	0
99	0
100	0
101	1
102	3
103	0
104	0
105	1

n	a(n)
1	2
2	4
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	0
11	2
12	0
13	0
14	1
15	0
16	0
17	1
18	1
19	1
20	1
21	0
22	0
23	1
24	0
25	0
26	0
27	2
28	6
29	0
30	0
31	1
32	0
33	0
34	0
35	0
36	1
37	1
38	0
39	2
40	3
41	0
42	0
43	0
44	0
45	0
46	4
47	0
48	1
49	2
50	4
51	0
52	1
53	0
54	0
55	0
56	0
57	0
58	0
59	2
60	0
61	0
62	0
63	0
64	0
65	1
66	0
67	0
68	0
69	0
70	3
71	1
72	1
73	2
74	0
75	1
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	0
85	1
86	1
87	0
88	0
89	0
90	1
91	0
92	0
93	1
94	0
95	2
96	0
97	1
98	0
99	0
100	0
101	1
102	3
103	0
104	0
105	1

n	a(n)
1	2
2	4
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	0
11	2
12	0
13	0
14	1
15	0
16	0
17	1
18	1
19	1
20	1
21	0
22	0
23	1
24	0
25	0
26	0
27	2
28	6
29	0
30	0
31	1
32	0
33	0
34	0
35	0
36	1
37	1
38	0
39	2
40	3
41	0
42	0
43	0
44	0
45	0
46	4
47	0
48	1
49	2
50	4
51	0
52	1
53	0
54	0
55	0
56	0
57	0
58	0
59	2
60	0
61	0
62	0
63	0
64	0
65	1
66	0
67	0
68	0
69	0
70	3
71	1
72	1
73	2
74	0
75	1
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	0
85	1
86	1
87	0
88	0
89	0
90	1
91	0
92	0
93	1
94	0
95	2
96	0
97	1
98	0
99	0
100	0
101	1
102	3
103	0
104	0
105	1