A100672 - cp's OEIS frontend

A100672 a(1) = 1; thereafter, a(n) = 1 if n-th prime is 3 mod 4, 0 if n-th prime is 1 mod 4.

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

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

cp's OEIS Frontend

A100672 a(1) = 1; thereafter, a(n) = 1 if n-th prime is 3 mod 4, 0 if n-th prime is 1 mod 4.

Table of values

List of values

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

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

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