A141666 - cp's OEIS frontend

A141666 A symmetrical triangle of coefficients based on A004018 (or number of ways of writing n as a sum of 2 squares): t(n,m) = r2(n-m+1)*r2(m+1).

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

[1, 4, 4, 4, 16, 4, 0, 16, 16, 0, 4, 0, 16, 0, 4, 8, 16, 0, 0, 16, 8, 0, 32, 16, 0, 16, 32, 0, 0, 0, 32, 0, 0, 32, 0, 0, 4, 0, 0, 0, 16, 0, 0, 0, 4, 4, 16, 0, 0, 32, 32, 0, 0, 16, 4, 8, 16, 16, 0, 0, 64, 0, 0, 16, 16, 8]

cp's OEIS Frontend

A141666 A symmetrical triangle of coefficients based on A004018 (or number of ways of writing n as a sum of 2 squares): t(n,m) = r2(n-m+1)*r2(m+1).

Table of values

List of values

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

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

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