A380868 - cp's OEIS frontend

A380868 Number of distinct solutions {n1, n2, n3, n4} to the problem of forming a rectangle with sides made of linked rods of length 1, ..., n.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	0
10	0
11	0
12	0
13	0
14	0
15	1
16	0
17	0
18	0
19	0
20	3
21	0
22	0
23	0
24	1
25	0
26	0
27	3
28	0
29	0
30	0
31	0
32	1
33	0
34	0
35	6
36	0
37	0
38	0
39	6
40	0
41	0
42	0
43	0
44	6
45	0
46	0
47	0
48	1
49	0
50	0
51	3
52	0
53	0
54	0
55	3
56	3
57	0
58	0
59	0
60	0
61	0
62	0
63	1
64	0
65	0
66	0
67	0
68	3
69	0
70	0
71	0
72	0
73	0
74	0
75	6
76	0
77	0
78	0
79	0
80	6
81	0
82	0
83	0
84	10
85	0
86	0
87	3
88	0
89	0
90	0
91	0
92	3
93	0
94	0
95	1
96	0
97	0
98	0
99	15

[0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 3, 0, 0, 0, 1, 0, 0, 3, 0, 0, 0, 0, 1, 0, 0, 6, 0, 0, 0, 6, 0, 0, 0, 0, 6, 0, 0, 0, 1, 0, 0, 3, 0, 0, 0, 3, 3, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 6, 0, 0, 0, 10, 0, 0, 3, 0, 0, 0, 0, 3, 0, 0, 1, 0, 0, 0, 15]

cp's OEIS Frontend

A380868 Number of distinct solutions {n1, n2, n3, n4} to the problem of forming a rectangle with sides made of linked rods of length 1, ..., 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	0
10	0
11	0
12	0
13	0
14	0
15	1
16	0
17	0
18	0
19	0
20	3
21	0
22	0
23	0
24	1
25	0
26	0
27	3
28	0
29	0
30	0
31	0
32	1
33	0
34	0
35	6
36	0
37	0
38	0
39	6
40	0
41	0
42	0
43	0
44	6
45	0
46	0
47	0
48	1
49	0
50	0
51	3
52	0
53	0
54	0
55	3
56	3
57	0
58	0
59	0
60	0
61	0
62	0
63	1
64	0
65	0
66	0
67	0
68	3
69	0
70	0
71	0
72	0
73	0
74	0
75	6
76	0
77	0
78	0
79	0
80	6
81	0
82	0
83	0
84	10
85	0
86	0
87	3
88	0
89	0
90	0
91	0
92	3
93	0
94	0
95	1
96	0
97	0
98	0
99	15

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	0
10	0
11	0
12	0
13	0
14	0
15	1
16	0
17	0
18	0
19	0
20	3
21	0
22	0
23	0
24	1
25	0
26	0
27	3
28	0
29	0
30	0
31	0
32	1
33	0
34	0
35	6
36	0
37	0
38	0
39	6
40	0
41	0
42	0
43	0
44	6
45	0
46	0
47	0
48	1
49	0
50	0
51	3
52	0
53	0
54	0
55	3
56	3
57	0
58	0
59	0
60	0
61	0
62	0
63	1
64	0
65	0
66	0
67	0
68	3
69	0
70	0
71	0
72	0
73	0
74	0
75	6
76	0
77	0
78	0
79	0
80	6
81	0
82	0
83	0
84	10
85	0
86	0
87	3
88	0
89	0
90	0
91	0
92	3
93	0
94	0
95	1
96	0
97	0
98	0
99	15

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	0
10	0
11	0
12	0
13	0
14	0
15	1
16	0
17	0
18	0
19	0
20	3
21	0
22	0
23	0
24	1
25	0
26	0
27	3
28	0
29	0
30	0
31	0
32	1
33	0
34	0
35	6
36	0
37	0
38	0
39	6
40	0
41	0
42	0
43	0
44	6
45	0
46	0
47	0
48	1
49	0
50	0
51	3
52	0
53	0
54	0
55	3
56	3
57	0
58	0
59	0
60	0
61	0
62	0
63	1
64	0
65	0
66	0
67	0
68	3
69	0
70	0
71	0
72	0
73	0
74	0
75	6
76	0
77	0
78	0
79	0
80	6
81	0
82	0
83	0
84	10
85	0
86	0
87	3
88	0
89	0
90	0
91	0
92	3
93	0
94	0
95	1
96	0
97	0
98	0
99	15