A352883 - cp's OEIS frontend

A352883 Irregular table read by rows: T(n,k) is the number of regions formed after k diagonals, with k>=0, are drawn between vertices of a regular n-gon, with n>=3, when each vertex in turn is connected to the vertex floor(n/2) vertices to its left, then floor(n/2)-1 vertices to its left, then floor(n/2)-2 vertices ... until all vertices are connected by diagonals.

n	a(n)
3	1
4	1
5	2
6	4
7	1
8	2
9	4
10	6
11	8
12	11
13	1
14	2
15	4
16	6
17	8
18	11
19	14
20	17
21	20
22	24
23	1
24	2
25	4
26	7
27	10
28	13
29	17
30	22
31	25
32	29
33	33
34	37
35	41
36	45
37	50
38	1
39	2
40	4
41	6
42	8
43	11
44	14
45	18
46	22
47	26
48	30
49	35
50	40
51	44
52	49
53	54
54	59
55	64
56	69
57	74
58	80
59	1
60	2
61	4
62	7
63	11
64	15
65	19
66	24
67	30
68	37
69	42
70	48
71	55
72	62
73	69
74	76
75	83
76	91
77	100
78	105
79	111
80	117
81	123
82	129
83	135
84	141
85	147
86	154

[1, 1, 2, 4, 1, 2, 4, 6, 8, 11, 1, 2, 4, 6, 8, 11, 14, 17, 20, 24, 1, 2, 4, 7, 10, 13, 17, 22, 25, 29, 33, 37, 41, 45, 50, 1, 2, 4, 6, 8, 11, 14, 18, 22, 26, 30, 35, 40, 44, 49, 54, 59, 64, 69, 74, 80, 1, 2, 4, 7, 11, 15, 19, 24, 30, 37, 42, 48, 55, 62, 69, 76, 83, 91, 100, 105, 111, 117, 123, 129, 135, 141, 147, 154]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
3	1
4	1
5	2
6	4
7	1
8	2
9	4
10	6
11	8
12	11
13	1
14	2
15	4
16	6
17	8
18	11
19	14
20	17
21	20
22	24
23	1
24	2
25	4
26	7
27	10
28	13
29	17
30	22
31	25
32	29
33	33
34	37
35	41
36	45
37	50
38	1
39	2
40	4
41	6
42	8
43	11
44	14
45	18
46	22
47	26
48	30
49	35
50	40
51	44
52	49
53	54
54	59
55	64
56	69
57	74
58	80
59	1
60	2
61	4
62	7
63	11
64	15
65	19
66	24
67	30
68	37
69	42
70	48
71	55
72	62
73	69
74	76
75	83
76	91
77	100
78	105
79	111
80	117
81	123
82	129
83	135
84	141
85	147
86	154

n	a(n)
3	1
4	1
5	2
6	4
7	1
8	2
9	4
10	6
11	8
12	11
13	1
14	2
15	4
16	6
17	8
18	11
19	14
20	17
21	20
22	24
23	1
24	2
25	4
26	7
27	10
28	13
29	17
30	22
31	25
32	29
33	33
34	37
35	41
36	45
37	50
38	1
39	2
40	4
41	6
42	8
43	11
44	14
45	18
46	22
47	26
48	30
49	35
50	40
51	44
52	49
53	54
54	59
55	64
56	69
57	74
58	80
59	1
60	2
61	4
62	7
63	11
64	15
65	19
66	24
67	30
68	37
69	42
70	48
71	55
72	62
73	69
74	76
75	83
76	91
77	100
78	105
79	111
80	117
81	123
82	129
83	135
84	141
85	147
86	154

n	a(n)
3	1
4	1
5	2
6	4
7	1
8	2
9	4
10	6
11	8
12	11
13	1
14	2
15	4
16	6
17	8
18	11
19	14
20	17
21	20
22	24
23	1
24	2
25	4
26	7
27	10
28	13
29	17
30	22
31	25
32	29
33	33
34	37
35	41
36	45
37	50
38	1
39	2
40	4
41	6
42	8
43	11
44	14
45	18
46	22
47	26
48	30
49	35
50	40
51	44
52	49
53	54
54	59
55	64
56	69
57	74
58	80
59	1
60	2
61	4
62	7
63	11
64	15
65	19
66	24
67	30
68	37
69	42
70	48
71	55
72	62
73	69
74	76
75	83
76	91
77	100
78	105
79	111
80	117
81	123
82	129
83	135
84	141
85	147
86	154