A282972 - cp's OEIS frontend

A282972 Number of ways to write n as 4x^4 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers such that 79y^2 - 220yz + 205*z^2 is a square.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	3
7	1
8	2
9	4
10	3
11	2
12	2
13	4
14	4
15	2
16	2
17	3
18	5
19	2
20	2
21	4
22	4
23	2
24	3
25	3
26	3
27	2
28	2
29	3
30	2
31	2
32	1
33	4
34	2
35	1
36	4
37	2
38	3
39	1
40	4
41	3
42	2
43	1
44	3
45	5
46	2
47	1
48	3
49	6
50	3
51	2
52	2
53	5
54	5
55	2
56	4
57	3
58	4
59	2
60	3
61	5
62	2
63	2
64	2
65	6
66	5
67	2
68	4
69	5
70	6
71	1
72	5
73	6
74	5
75	4
76	5
77	5
78	6
79	2
80	4

[1, 1, 1, 1, 2, 2, 3, 1, 2, 4, 3, 2, 2, 4, 4, 2, 2, 3, 5, 2, 2, 4, 4, 2, 3, 3, 3, 2, 2, 3, 2, 2, 1, 4, 2, 1, 4, 2, 3, 1, 4, 3, 2, 1, 3, 5, 2, 1, 3, 6, 3, 2, 2, 5, 5, 2, 4, 3, 4, 2, 3, 5, 2, 2, 2, 6, 5, 2, 4, 5, 6, 1, 5, 6, 5, 4, 5, 5, 6, 2, 4]

cp's OEIS Frontend

A282972 Number of ways to write n as 4x^4 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers such that 79y^2 - 220yz + 205*z^2 is a square.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	3
7	1
8	2
9	4
10	3
11	2
12	2
13	4
14	4
15	2
16	2
17	3
18	5
19	2
20	2
21	4
22	4
23	2
24	3
25	3
26	3
27	2
28	2
29	3
30	2
31	2
32	1
33	4
34	2
35	1
36	4
37	2
38	3
39	1
40	4
41	3
42	2
43	1
44	3
45	5
46	2
47	1
48	3
49	6
50	3
51	2
52	2
53	5
54	5
55	2
56	4
57	3
58	4
59	2
60	3
61	5
62	2
63	2
64	2
65	6
66	5
67	2
68	4
69	5
70	6
71	1
72	5
73	6
74	5
75	4
76	5
77	5
78	6
79	2
80	4

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	3
7	1
8	2
9	4
10	3
11	2
12	2
13	4
14	4
15	2
16	2
17	3
18	5
19	2
20	2
21	4
22	4
23	2
24	3
25	3
26	3
27	2
28	2
29	3
30	2
31	2
32	1
33	4
34	2
35	1
36	4
37	2
38	3
39	1
40	4
41	3
42	2
43	1
44	3
45	5
46	2
47	1
48	3
49	6
50	3
51	2
52	2
53	5
54	5
55	2
56	4
57	3
58	4
59	2
60	3
61	5
62	2
63	2
64	2
65	6
66	5
67	2
68	4
69	5
70	6
71	1
72	5
73	6
74	5
75	4
76	5
77	5
78	6
79	2
80	4

cp's OEIS Frontend

A282972 Number of ways to write n as 4*x^4 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers such that 79*y^2 - 220*y*z + 205*z^2 is a square.

Table of values

List of values

A282972 Number of ways to write n as 4x^4 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers such that 79y^2 - 220yz + 205*z^2 is a square.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	3
7	1
8	2
9	4
10	3
11	2
12	2
13	4
14	4
15	2
16	2
17	3
18	5
19	2
20	2
21	4
22	4
23	2
24	3
25	3
26	3
27	2
28	2
29	3
30	2
31	2
32	1
33	4
34	2
35	1
36	4
37	2
38	3
39	1
40	4
41	3
42	2
43	1
44	3
45	5
46	2
47	1
48	3
49	6
50	3
51	2
52	2
53	5
54	5
55	2
56	4
57	3
58	4
59	2
60	3
61	5
62	2
63	2
64	2
65	6
66	5
67	2
68	4
69	5
70	6
71	1
72	5
73	6
74	5
75	4
76	5
77	5
78	6
79	2
80	4