A374020 - cp's OEIS frontend

A374020 Number of solutions to a^2 + d^2 = b^2 + c^2 with 1 <= a < b < c < d <= n.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	2
10	2
11	4
12	5
13	7
14	9
15	10
16	12
17	15
18	18
19	23
20	26
21	29
22	33
23	39
24	43
25	48
26	54
27	60
28	65
29	74
30	79
31	87
32	96
33	105
34	114
35	122
36	129
37	140
38	151
39	162
40	171
41	185
42	194
43	210
44	223
45	233
46	247
47	264
48	277
49	293
50	308
51	323
52	338
53	360
54	376
55	392
56	407
57	425
58	444
59	468
60	484

[0, 0, 0, 0, 0, 0, 0, 1, 2, 2, 4, 5, 7, 9, 10, 12, 15, 18, 23, 26, 29, 33, 39, 43, 48, 54, 60, 65, 74, 79, 87, 96, 105, 114, 122, 129, 140, 151, 162, 171, 185, 194, 210, 223, 233, 247, 264, 277, 293, 308, 323, 338, 360, 376, 392, 407, 425, 444, 468, 484]

cp's OEIS Frontend

A374020 Number of solutions to a^2 + d^2 = b^2 + c^2 with 1 <= a < b < c < d <= n.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	2
10	2
11	4
12	5
13	7
14	9
15	10
16	12
17	15
18	18
19	23
20	26
21	29
22	33
23	39
24	43
25	48
26	54
27	60
28	65
29	74
30	79
31	87
32	96
33	105
34	114
35	122
36	129
37	140
38	151
39	162
40	171
41	185
42	194
43	210
44	223
45	233
46	247
47	264
48	277
49	293
50	308
51	323
52	338
53	360
54	376
55	392
56	407
57	425
58	444
59	468
60	484

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	2
10	2
11	4
12	5
13	7
14	9
15	10
16	12
17	15
18	18
19	23
20	26
21	29
22	33
23	39
24	43
25	48
26	54
27	60
28	65
29	74
30	79
31	87
32	96
33	105
34	114
35	122
36	129
37	140
38	151
39	162
40	171
41	185
42	194
43	210
44	223
45	233
46	247
47	264
48	277
49	293
50	308
51	323
52	338
53	360
54	376
55	392
56	407
57	425
58	444
59	468
60	484

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	2
10	2
11	4
12	5
13	7
14	9
15	10
16	12
17	15
18	18
19	23
20	26
21	29
22	33
23	39
24	43
25	48
26	54
27	60
28	65
29	74
30	79
31	87
32	96
33	105
34	114
35	122
36	129
37	140
38	151
39	162
40	171
41	185
42	194
43	210
44	223
45	233
46	247
47	264
48	277
49	293
50	308
51	323
52	338
53	360
54	376
55	392
56	407
57	425
58	444
59	468
60	484