A333167 - cp's OEIS frontend

A333167 a(n) = r_2(n^2 + 1), where r_2(k) is the number of ways of writing k as a sum of 2 squares (A004018).

n	a(n)
0	4
1	4
2	8
3	8
4	8
5	8
6	8
7	12
8	16
9	8
10	8
11	8
12	16
13	16
14	8
15	8
16	8
17	16
18	24
19	8
20	8
21	16
22	16
23	16
24	8
25	8
26	8
27	16
28	16
29	8
30	16
31	16
32	24
33	16
34	16
35	8
36	8
37	16
38	24
39	8
40	8
41	12
42	16
43	24
44	16
45	8
46	16
47	32
48	16
49	8
50	16
51	8
52	16
53	16
54	8
55	16
56	8
57	32
58	16
59	8
60	16
61	8
62	16
63	16
64	16
65	8
66	8
67	16
68	32
69	8
70	24
71	8
72	32
73	32

[4, 4, 8, 8, 8, 8, 8, 12, 16, 8, 8, 8, 16, 16, 8, 8, 8, 16, 24, 8, 8, 16, 16, 16, 8, 8, 8, 16, 16, 8, 16, 16, 24, 16, 16, 8, 8, 16, 24, 8, 8, 12, 16, 24, 16, 8, 16, 32, 16, 8, 16, 8, 16, 16, 8, 16, 8, 32, 16, 8, 16, 8, 16, 16, 16, 8, 8, 16, 32, 8, 24, 8, 32, 32]

cp's OEIS Frontend

A333167 a(n) = r_2(n^2 + 1), where r_2(k) is the number of ways of writing k as a sum of 2 squares (A004018).

Table of values

List of values

n	a(n)
0	4
1	4
2	8
3	8
4	8
5	8
6	8
7	12
8	16
9	8
10	8
11	8
12	16
13	16
14	8
15	8
16	8
17	16
18	24
19	8
20	8
21	16
22	16
23	16
24	8
25	8
26	8
27	16
28	16
29	8
30	16
31	16
32	24
33	16
34	16
35	8
36	8
37	16
38	24
39	8
40	8
41	12
42	16
43	24
44	16
45	8
46	16
47	32
48	16
49	8
50	16
51	8
52	16
53	16
54	8
55	16
56	8
57	32
58	16
59	8
60	16
61	8
62	16
63	16
64	16
65	8
66	8
67	16
68	32
69	8
70	24
71	8
72	32
73	32

n	a(n)
0	4
1	4
2	8
3	8
4	8
5	8
6	8
7	12
8	16
9	8
10	8
11	8
12	16
13	16
14	8
15	8
16	8
17	16
18	24
19	8
20	8
21	16
22	16
23	16
24	8
25	8
26	8
27	16
28	16
29	8
30	16
31	16
32	24
33	16
34	16
35	8
36	8
37	16
38	24
39	8
40	8
41	12
42	16
43	24
44	16
45	8
46	16
47	32
48	16
49	8
50	16
51	8
52	16
53	16
54	8
55	16
56	8
57	32
58	16
59	8
60	16
61	8
62	16
63	16
64	16
65	8
66	8
67	16
68	32
69	8
70	24
71	8
72	32
73	32

n	a(n)
0	4
1	4
2	8
3	8
4	8
5	8
6	8
7	12
8	16
9	8
10	8
11	8
12	16
13	16
14	8
15	8
16	8
17	16
18	24
19	8
20	8
21	16
22	16
23	16
24	8
25	8
26	8
27	16
28	16
29	8
30	16
31	16
32	24
33	16
34	16
35	8
36	8
37	16
38	24
39	8
40	8
41	12
42	16
43	24
44	16
45	8
46	16
47	32
48	16
49	8
50	16
51	8
52	16
53	16
54	8
55	16
56	8
57	32
58	16
59	8
60	16
61	8
62	16
63	16
64	16
65	8
66	8
67	16
68	32
69	8
70	24
71	8
72	32
73	32