A224931 - cp's OEIS frontend

A224931 Number of integer parallelograms with integer side lengths n = a >= b and integer diagonal lengths e >= f.

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

[0, 0, 0, 1, 1, 0, 2, 1, 2, 2, 3, 3, 4, 3, 4, 6, 6, 4, 7, 5, 6, 9, 8, 9, 10, 9, 9, 9, 15, 9, 15, 12, 11, 15, 13, 12, 20, 18, 16, 15, 21, 17, 21, 18, 20, 21, 25, 20, 22, 23, 25, 24, 27, 22, 29, 26, 28, 31, 34, 26, 35, 32, 26, 33, 35, 30, 41, 33, 36, 34, 42, 35]

cp's OEIS Frontend

A224931 Number of integer parallelograms with integer side lengths n = a >= b and integer diagonal lengths e >= f.

Table of values

List of values

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

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

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