A281494 - cp's OEIS frontend

A281494 Number of ordered ways to write n as x^2 + y^2 + z^2 + w^2 with x + y + z + w = 2^(floor((ord_2(n)+1)/2)), where ord_2(n) is the 2-adic order of n, and x,y,z,w are integers with |x| <= |y| <= |z| <= |w|.

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

[1, 1, 3, 5, 1, 2, 4, 1, 2, 4, 1, 6, 4, 1, 3, 5, 1, 4, 3, 3, 4, 4, 2, 2, 3, 2, 3, 8, 1, 3, 4, 1, 5, 5, 2, 4, 3, 2, 2, 4, 1, 7, 7, 2, 4, 3, 2, 6, 3, 3, 3, 9, 2, 5, 4, 1, 5, 4, 2, 6, 4, 3, 6, 5, 2, 5, 2, 2, 4, 6, 2, 4, 6, 4, 5, 6, 3, 4, 4, 3]

cp's OEIS Frontend

A281494 Number of ordered ways to write n as x^2 + y^2 + z^2 + w^2 with x + y + z + w = 2^(floor((ord_2(n)+1)/2)), where ord_2(n) is the 2-adic order of n, and x,y,z,w are integers with |x| <= |y| <= |z| <= |w|.

Table of values

List of values

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

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

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