A331450 - cp's OEIS frontend

A331450 Irregular triangle read by rows: Take a regular n-sided polygon (n>=3) with all diagonals drawn, as in A007678. Then T(n,k) = number of k-sided polygons in that figure for k = 3, 4, ..., max_k.

n	a(n)
3	1
4	4
5	10
6	0
7	1
8	18
9	6
10	35
11	7
12	7
13	0
14	1
15	56
16	24
17	90
18	36
19	18
20	9
21	0
22	0
23	1
24	120
25	90
26	10
27	176
28	132
29	44
30	22
31	276
32	168
33	377
34	234
35	117
36	39
37	0
38	13
39	0
40	0
41	0
42	0
43	1
44	476
45	378
46	98
47	585
48	600
49	150
50	105
51	15
52	0
53	0
54	0
55	0
56	0
57	0
58	0
59	1
60	848
61	672
62	128
63	48
64	1054
65	901
66	357
67	136
68	17
69	34
70	0
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	1
79	1404
80	954
81	72
82	18
83	18
84	1653
85	1444
86	646
87	190
88	57
89	38
90	2200
91	1580
92	580
93	120
94	0
95	20
96	2268
97	2520
98	903
99	462
100	21
101	0
102	0
103	0
104	0
105	0
106	0
107	0
108	0
109	0
110	0
111	0
112	0
113	0
114	1

[1, 4, 10, 0, 1, 18, 6, 35, 7, 7, 0, 1, 56, 24, 90, 36, 18, 9, 0, 0, 1, 120, 90, 10, 176, 132, 44, 22, 276, 168, 377, 234, 117, 39, 0, 13, 0, 0, 0, 0, 1, 476, 378, 98, 585, 600, 150, 105, 15, 0, 0, 0, 0, 0, 0, 0, 1, 848, 672, 128, 48, 1054, 901, 357, 136, 17, 34, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1404, 954, 72, 18, 18, 1653, 1444, 646, 190, 57, 38, 2200, 1580, 580, 120, 0, 20, 2268, 2520, 903, 462, 21, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]

cp's OEIS Frontend

A331450 Irregular triangle read by rows: Take a regular n-sided polygon (n>=3) with all diagonals drawn, as in A007678. Then T(n,k) = number of k-sided polygons in that figure for k = 3, 4, ..., max_k.

Table of values

List of values