A335294 - cp's OEIS frontend

A335294 a(n) = pi(n) - pi(Sum_{k=1..n-1} a(k)) with a(1) = 1, where pi() is the prime counting function A000720.

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

[1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 2, 1, 1, 0, 1, 1, 2, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 2, 2, 1, 1, 0, 0, 1, 1, 1, 1, 2, 1, 2, 2, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 0, 0, 1, 1, 1, 1, 2, 1, 2, 2, 1, 0, 0, 0, 1, 1, 1, 1, 2, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1]

cp's OEIS Frontend

A335294 a(n) = pi(n) - pi(Sum_{k=1..n-1} a(k)) with a(1) = 1, where pi() is the prime counting function A000720.

Table of values

List of values

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

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

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