A353497 - cp's OEIS frontend

A353497 The smallest prime factor of n, reduced modulo 4, with a(1) = 1.

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

[1, 2, 3, 2, 1, 2, 3, 2, 3, 2, 3, 2, 1, 2, 3, 2, 1, 2, 3, 2, 3, 2, 3, 2, 1, 2, 3, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 1, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 3, 2, 1, 2, 3, 2, 1, 2, 3, 2, 3, 2, 3, 2, 1, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 1, 2, 3, 2, 1, 2, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 1, 2, 3, 2, 3]

cp's OEIS Frontend

A353497 The smallest prime factor of n, reduced modulo 4, with a(1) = 1.

Table of values

List of values

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

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

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