A260625 - cp's OEIS frontend

A260625 Number of ordered ways to write n as x^2 + y^2 + z^2 + w^2 with (x+3y+13z)xy*z a square, where x is a positive integer, and y,z,w are nonnegative integers with y >= z.

n	a(n)
1	1
2	2
3	1
4	1
5	4
6	4
7	1
8	2
9	4
10	5
11	3
12	1
13	4
14	7
15	2
16	1
17	7
18	6
19	5
20	6
21	6
22	5
23	4
24	4
25	6
26	11
27	4
28	3
29	10
30	7
31	2
32	2
33	7
34	7
35	8
36	4
37	4
38	10
39	1
40	5
41	13
42	7
43	3
44	5
45	10
46	6
47	1
48	1
49	8
50	13
51	7
52	5
53	10
54	13
55	5
56	7
57	7
58	6
59	9
60	3
61	10
62	13
63	3
64	1
65	15
66	13
67	5
68	10
69	12
70	8
71	3
72	6
73	8
74	16
75	8
76	8
77	14
78	8
79	2
80	6

[1, 2, 1, 1, 4, 4, 1, 2, 4, 5, 3, 1, 4, 7, 2, 1, 7, 6, 5, 6, 6, 5, 4, 4, 6, 11, 4, 3, 10, 7, 2, 2, 7, 7, 8, 4, 4, 10, 1, 5, 13, 7, 3, 5, 10, 6, 1, 1, 8, 13, 7, 5, 10, 13, 5, 7, 7, 6, 9, 3, 10, 13, 3, 1, 15, 13, 5, 10, 12, 8, 3, 6, 8, 16, 8, 8, 14, 8, 2, 6]

cp's OEIS Frontend

A260625 Number of ordered ways to write n as x^2 + y^2 + z^2 + w^2 with (x+3y+13z)xy*z a square, where x is a positive integer, and y,z,w are nonnegative integers with y >= z.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	1
5	4
6	4
7	1
8	2
9	4
10	5
11	3
12	1
13	4
14	7
15	2
16	1
17	7
18	6
19	5
20	6
21	6
22	5
23	4
24	4
25	6
26	11
27	4
28	3
29	10
30	7
31	2
32	2
33	7
34	7
35	8
36	4
37	4
38	10
39	1
40	5
41	13
42	7
43	3
44	5
45	10
46	6
47	1
48	1
49	8
50	13
51	7
52	5
53	10
54	13
55	5
56	7
57	7
58	6
59	9
60	3
61	10
62	13
63	3
64	1
65	15
66	13
67	5
68	10
69	12
70	8
71	3
72	6
73	8
74	16
75	8
76	8
77	14
78	8
79	2
80	6

n	a(n)
1	1
2	2
3	1
4	1
5	4
6	4
7	1
8	2
9	4
10	5
11	3
12	1
13	4
14	7
15	2
16	1
17	7
18	6
19	5
20	6
21	6
22	5
23	4
24	4
25	6
26	11
27	4
28	3
29	10
30	7
31	2
32	2
33	7
34	7
35	8
36	4
37	4
38	10
39	1
40	5
41	13
42	7
43	3
44	5
45	10
46	6
47	1
48	1
49	8
50	13
51	7
52	5
53	10
54	13
55	5
56	7
57	7
58	6
59	9
60	3
61	10
62	13
63	3
64	1
65	15
66	13
67	5
68	10
69	12
70	8
71	3
72	6
73	8
74	16
75	8
76	8
77	14
78	8
79	2
80	6

cp's OEIS Frontend

A260625 Number of ordered ways to write n as x^2 + y^2 + z^2 + w^2 with (x+3*y+13*z)*x*y*z a square, where x is a positive integer, and y,z,w are nonnegative integers with y >= z.

Table of values

List of values

A260625 Number of ordered ways to write n as x^2 + y^2 + z^2 + w^2 with (x+3y+13z)xy*z a square, where x is a positive integer, and y,z,w are nonnegative integers with y >= z.

n	a(n)
1	1
2	2
3	1
4	1
5	4
6	4
7	1
8	2
9	4
10	5
11	3
12	1
13	4
14	7
15	2
16	1
17	7
18	6
19	5
20	6
21	6
22	5
23	4
24	4
25	6
26	11
27	4
28	3
29	10
30	7
31	2
32	2
33	7
34	7
35	8
36	4
37	4
38	10
39	1
40	5
41	13
42	7
43	3
44	5
45	10
46	6
47	1
48	1
49	8
50	13
51	7
52	5
53	10
54	13
55	5
56	7
57	7
58	6
59	9
60	3
61	10
62	13
63	3
64	1
65	15
66	13
67	5
68	10
69	12
70	8
71	3
72	6
73	8
74	16
75	8
76	8
77	14
78	8
79	2
80	6