A293819 - cp's OEIS frontend

A293819 Triangle read by rows of the number of integer-sided k-gons having perimeter n, modulo rotations but not reflections, for k=3..n.

n	a(n)
3	1
4	0
5	1
6	1
7	1
8	1
9	1
10	2
11	1
12	1
13	2
14	4
15	3
16	1
17	1
18	1
19	6
20	6
21	4
22	1
23	1
24	4
25	10
26	13
27	10
28	4
29	1
30	1
31	2
32	12
33	21
34	21
35	12
36	5
37	1
38	1
39	5
40	20
41	37
42	41
43	30
44	15
45	5
46	1
47	1
48	4
49	23
50	51
51	74
52	65
53	43
54	19
55	6
56	1
57	1
58	7
59	35
60	84
61	126
62	131
63	99
64	55
65	22
66	6
67	1
68	1
69	5
70	38
71	108
72	196
73	239
74	216
75	143
76	73
77	26
78	7
79	1
80	1
81	10
82	56
83	166
84	314
85	422
86	428

[1, 0, 1, 1, 1, 1, 1, 2, 1, 1, 2, 4, 3, 1, 1, 1, 6, 6, 4, 1, 1, 4, 10, 13, 10, 4, 1, 1, 2, 12, 21, 21, 12, 5, 1, 1, 5, 20, 37, 41, 30, 15, 5, 1, 1, 4, 23, 51, 74, 65, 43, 19, 6, 1, 1, 7, 35, 84, 126, 131, 99, 55, 22, 6, 1, 1, 5, 38, 108, 196, 239, 216, 143, 73, 26, 7, 1, 1, 10, 56, 166, 314, 422, 428]

cp's OEIS Frontend

A293819 Triangle read by rows of the number of integer-sided k-gons having perimeter n, modulo rotations but not reflections, for k=3..n.

Table of values

List of values

n	a(n)
3	1
4	0
5	1
6	1
7	1
8	1
9	1
10	2
11	1
12	1
13	2
14	4
15	3
16	1
17	1
18	1
19	6
20	6
21	4
22	1
23	1
24	4
25	10
26	13
27	10
28	4
29	1
30	1
31	2
32	12
33	21
34	21
35	12
36	5
37	1
38	1
39	5
40	20
41	37
42	41
43	30
44	15
45	5
46	1
47	1
48	4
49	23
50	51
51	74
52	65
53	43
54	19
55	6
56	1
57	1
58	7
59	35
60	84
61	126
62	131
63	99
64	55
65	22
66	6
67	1
68	1
69	5
70	38
71	108
72	196
73	239
74	216
75	143
76	73
77	26
78	7
79	1
80	1
81	10
82	56
83	166
84	314
85	422
86	428

n	a(n)
3	1
4	0
5	1
6	1
7	1
8	1
9	1
10	2
11	1
12	1
13	2
14	4
15	3
16	1
17	1
18	1
19	6
20	6
21	4
22	1
23	1
24	4
25	10
26	13
27	10
28	4
29	1
30	1
31	2
32	12
33	21
34	21
35	12
36	5
37	1
38	1
39	5
40	20
41	37
42	41
43	30
44	15
45	5
46	1
47	1
48	4
49	23
50	51
51	74
52	65
53	43
54	19
55	6
56	1
57	1
58	7
59	35
60	84
61	126
62	131
63	99
64	55
65	22
66	6
67	1
68	1
69	5
70	38
71	108
72	196
73	239
74	216
75	143
76	73
77	26
78	7
79	1
80	1
81	10
82	56
83	166
84	314
85	422
86	428

n	a(n)
3	1
4	0
5	1
6	1
7	1
8	1
9	1
10	2
11	1
12	1
13	2
14	4
15	3
16	1
17	1
18	1
19	6
20	6
21	4
22	1
23	1
24	4
25	10
26	13
27	10
28	4
29	1
30	1
31	2
32	12
33	21
34	21
35	12
36	5
37	1
38	1
39	5
40	20
41	37
42	41
43	30
44	15
45	5
46	1
47	1
48	4
49	23
50	51
51	74
52	65
53	43
54	19
55	6
56	1
57	1
58	7
59	35
60	84
61	126
62	131
63	99
64	55
65	22
66	6
67	1
68	1
69	5
70	38
71	108
72	196
73	239
74	216
75	143
76	73
77	26
78	7
79	1
80	1
81	10
82	56
83	166
84	314
85	422
86	428