A378148 - cp's OEIS frontend

A378148 a(n) is the number of distinct trapezoids having integer sides and height with exactly one pair of parallel sides and area n.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	1
11	0
12	1
13	0
14	1
15	2
16	1
17	0
18	3
19	0
20	1
21	2
22	1
23	0
24	3
25	0
26	1
27	2
28	1
29	0
30	4
31	0
32	2
33	2
34	1
35	1
36	5
37	0
38	1
39	2
40	3
41	0
42	5
43	0
44	2
45	3
46	1
47	0
48	6
49	0
50	2
51	2
52	2
53	0
54	7
55	1
56	3
57	2
58	1
59	0
60	9
61	0
62	1
63	3
64	3
65	2
66	8
67	0
68	3
69	2
70	3
71	0
72	10
73	0
74	1
75	5
76	3
77	0
78	9
79	0
80	6
81	3
82	1
83	0
84	10
85	2
86	1
87	2

[0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 1, 2, 1, 0, 3, 0, 1, 2, 1, 0, 3, 0, 1, 2, 1, 0, 4, 0, 2, 2, 1, 1, 5, 0, 1, 2, 3, 0, 5, 0, 2, 3, 1, 0, 6, 0, 2, 2, 2, 0, 7, 1, 3, 2, 1, 0, 9, 0, 1, 3, 3, 2, 8, 0, 3, 2, 3, 0, 10, 0, 1, 5, 3, 0, 9, 0, 6, 3, 1, 0, 10, 2, 1, 2]

cp's OEIS Frontend

A378148 a(n) is the number of distinct trapezoids having integer sides and height with exactly one pair of parallel sides and area 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	0
9	1
10	1
11	0
12	1
13	0
14	1
15	2
16	1
17	0
18	3
19	0
20	1
21	2
22	1
23	0
24	3
25	0
26	1
27	2
28	1
29	0
30	4
31	0
32	2
33	2
34	1
35	1
36	5
37	0
38	1
39	2
40	3
41	0
42	5
43	0
44	2
45	3
46	1
47	0
48	6
49	0
50	2
51	2
52	2
53	0
54	7
55	1
56	3
57	2
58	1
59	0
60	9
61	0
62	1
63	3
64	3
65	2
66	8
67	0
68	3
69	2
70	3
71	0
72	10
73	0
74	1
75	5
76	3
77	0
78	9
79	0
80	6
81	3
82	1
83	0
84	10
85	2
86	1
87	2

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	1
11	0
12	1
13	0
14	1
15	2
16	1
17	0
18	3
19	0
20	1
21	2
22	1
23	0
24	3
25	0
26	1
27	2
28	1
29	0
30	4
31	0
32	2
33	2
34	1
35	1
36	5
37	0
38	1
39	2
40	3
41	0
42	5
43	0
44	2
45	3
46	1
47	0
48	6
49	0
50	2
51	2
52	2
53	0
54	7
55	1
56	3
57	2
58	1
59	0
60	9
61	0
62	1
63	3
64	3
65	2
66	8
67	0
68	3
69	2
70	3
71	0
72	10
73	0
74	1
75	5
76	3
77	0
78	9
79	0
80	6
81	3
82	1
83	0
84	10
85	2
86	1
87	2

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	1
11	0
12	1
13	0
14	1
15	2
16	1
17	0
18	3
19	0
20	1
21	2
22	1
23	0
24	3
25	0
26	1
27	2
28	1
29	0
30	4
31	0
32	2
33	2
34	1
35	1
36	5
37	0
38	1
39	2
40	3
41	0
42	5
43	0
44	2
45	3
46	1
47	0
48	6
49	0
50	2
51	2
52	2
53	0
54	7
55	1
56	3
57	2
58	1
59	0
60	9
61	0
62	1
63	3
64	3
65	2
66	8
67	0
68	3
69	2
70	3
71	0
72	10
73	0
74	1
75	5
76	3
77	0
78	9
79	0
80	6
81	3
82	1
83	0
84	10
85	2
86	1
87	2