A279647 - cp's OEIS frontend

A279647 Irregular triangle read by rows: possible numbers of the diagonals of an n-faced convex polyhedron.

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

[0, 0, 0, 1, 2, 4, 0, 2, 3, 4, 5, 6, 7, 9, 10, 0, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 0, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34]

cp's OEIS Frontend

A279647 Irregular triangle read by rows: possible numbers of the diagonals of an n-faced convex polyhedron.

Table of values

List of values

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

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

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