A337082 - cp's OEIS frontend

A337082 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with 2x^2 + 4y^2 - 7xy a power of two (including 2^0 = 1), where x, y, z, w are nonnegative integers with z <= w.

n	a(n)
1	2
2	2
3	2
4	2
5	5
6	5
7	1
8	2
9	5
10	4
11	3
12	3
13	4
14	7
15	3
16	2
17	8
18	8
19	4
20	6
21	10
22	6
23	3
24	5
25	5
26	9
27	4
28	2
29	8
30	10
31	2
32	2
33	9
34	4
35	5
36	6
37	5
38	7
39	3
40	4
41	10
42	10
43	1
44	4
45	9
46	6
47	2
48	3
49	6
50	8
51	6
52	4
53	11
54	12
55	4
56	7
57	10
58	5
59	3
60	5
61	5
62	9
63	5
64	2
65	14
66	16
67	3
68	9
69	18
70	9
71	3
72	8
73	9
74	11
75	7
76	5
77	12
78	14
79	3
80	6
81	16
82	11
83	5
84	12
85	12
86	10
87	4
88	6
89	15
90	17
91	6
92	5
93	12
94	9
95	4
96	5
97	7
98	12
99	7
100	7

[2, 2, 2, 2, 5, 5, 1, 2, 5, 4, 3, 3, 4, 7, 3, 2, 8, 8, 4, 6, 10, 6, 3, 5, 5, 9, 4, 2, 8, 10, 2, 2, 9, 4, 5, 6, 5, 7, 3, 4, 10, 10, 1, 4, 9, 6, 2, 3, 6, 8, 6, 4, 11, 12, 4, 7, 10, 5, 3, 5, 5, 9, 5, 2, 14, 16, 3, 9, 18, 9, 3, 8, 9, 11, 7, 5, 12, 14, 3, 6, 16, 11, 5, 12, 12, 10, 4, 6, 15, 17, 6, 5, 12, 9, 4, 5, 7, 12, 7, 7]

cp's OEIS Frontend

A337082 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with 2x^2 + 4y^2 - 7xy a power of two (including 2^0 = 1), where x, y, z, w are nonnegative integers with z <= w.

Table of values

List of values

n	a(n)
1	2
2	2
3	2
4	2
5	5
6	5
7	1
8	2
9	5
10	4
11	3
12	3
13	4
14	7
15	3
16	2
17	8
18	8
19	4
20	6
21	10
22	6
23	3
24	5
25	5
26	9
27	4
28	2
29	8
30	10
31	2
32	2
33	9
34	4
35	5
36	6
37	5
38	7
39	3
40	4
41	10
42	10
43	1
44	4
45	9
46	6
47	2
48	3
49	6
50	8
51	6
52	4
53	11
54	12
55	4
56	7
57	10
58	5
59	3
60	5
61	5
62	9
63	5
64	2
65	14
66	16
67	3
68	9
69	18
70	9
71	3
72	8
73	9
74	11
75	7
76	5
77	12
78	14
79	3
80	6
81	16
82	11
83	5
84	12
85	12
86	10
87	4
88	6
89	15
90	17
91	6
92	5
93	12
94	9
95	4
96	5
97	7
98	12
99	7
100	7

n	a(n)
1	2
2	2
3	2
4	2
5	5
6	5
7	1
8	2
9	5
10	4
11	3
12	3
13	4
14	7
15	3
16	2
17	8
18	8
19	4
20	6
21	10
22	6
23	3
24	5
25	5
26	9
27	4
28	2
29	8
30	10
31	2
32	2
33	9
34	4
35	5
36	6
37	5
38	7
39	3
40	4
41	10
42	10
43	1
44	4
45	9
46	6
47	2
48	3
49	6
50	8
51	6
52	4
53	11
54	12
55	4
56	7
57	10
58	5
59	3
60	5
61	5
62	9
63	5
64	2
65	14
66	16
67	3
68	9
69	18
70	9
71	3
72	8
73	9
74	11
75	7
76	5
77	12
78	14
79	3
80	6
81	16
82	11
83	5
84	12
85	12
86	10
87	4
88	6
89	15
90	17
91	6
92	5
93	12
94	9
95	4
96	5
97	7
98	12
99	7
100	7

cp's OEIS Frontend

A337082 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with 2*x^2 + 4*y^2 - 7*x*y a power of two (including 2^0 = 1), where x, y, z, w are nonnegative integers with z <= w.

Table of values

List of values

A337082 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with 2x^2 + 4y^2 - 7xy a power of two (including 2^0 = 1), where x, y, z, w are nonnegative integers with z <= w.

n	a(n)
1	2
2	2
3	2
4	2
5	5
6	5
7	1
8	2
9	5
10	4
11	3
12	3
13	4
14	7
15	3
16	2
17	8
18	8
19	4
20	6
21	10
22	6
23	3
24	5
25	5
26	9
27	4
28	2
29	8
30	10
31	2
32	2
33	9
34	4
35	5
36	6
37	5
38	7
39	3
40	4
41	10
42	10
43	1
44	4
45	9
46	6
47	2
48	3
49	6
50	8
51	6
52	4
53	11
54	12
55	4
56	7
57	10
58	5
59	3
60	5
61	5
62	9
63	5
64	2
65	14
66	16
67	3
68	9
69	18
70	9
71	3
72	8
73	9
74	11
75	7
76	5
77	12
78	14
79	3
80	6
81	16
82	11
83	5
84	12
85	12
86	10
87	4
88	6
89	15
90	17
91	6
92	5
93	12
94	9
95	4
96	5
97	7
98	12
99	7
100	7