A261876 - cp's OEIS frontend

A261876 Number of ordered ways to write n as x^2 + y^2 + z^2 + w^2 with (5x^2+7y^2+9z^2)y*z a square, where x,y,z,w are nonnegative integers with z > 0.

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

[1, 3, 2, 1, 4, 5, 1, 3, 5, 5, 4, 2, 4, 7, 2, 1, 9, 9, 4, 4, 7, 5, 1, 5, 6, 12, 7, 1, 10, 9, 2, 3, 10, 9, 7, 5, 4, 11, 3, 5, 14, 10, 4, 4, 10, 9, 3, 2, 8, 17, 10, 4, 11, 18, 6, 7, 9, 6, 11, 2, 10, 15, 4, 1, 15, 17, 4, 9, 13, 10]

cp's OEIS Frontend

A261876 Number of ordered ways to write n as x^2 + y^2 + z^2 + w^2 with (5x^2+7y^2+9z^2)y*z a square, where x,y,z,w are nonnegative integers with z > 0.

Table of values

List of values

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

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

cp's OEIS Frontend

A261876 Number of ordered ways to write n as x^2 + y^2 + z^2 + w^2 with (5*x^2+7*y^2+9*z^2)*y*z a square, where x,y,z,w are nonnegative integers with z > 0.

Table of values

List of values

A261876 Number of ordered ways to write n as x^2 + y^2 + z^2 + w^2 with (5x^2+7y^2+9z^2)y*z a square, where x,y,z,w are nonnegative integers with z > 0.

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