A090985 - cp's OEIS frontend

A090985 Triangle read by rows: T(n,k) is the number of dissections of a convex n-gon by nonintersecting diagonals, having exactly k triangles (n >= 2, k >= 0).

n	a(n)
2	1
3	0
4	1
5	1
6	0
7	2
8	1
9	5
10	0
11	5
12	4
13	6
14	21
15	0
16	14
17	8
18	35
19	28
20	84
21	0
22	42
23	25
24	80
25	216
26	120
27	330
28	0
29	132
30	64
31	309
32	540
33	1155
34	495
35	1287
36	0
37	429
38	191
39	890
40	2475
41	3080
42	5720
43	2002
44	5005
45	0
46	1430
47	540
48	3058
49	7788
50	16302
51	16016
52	27027
53	8008
54	19448
55	0
56	4862
57	1616
58	9580
59	30108
60	54964
61	96005
62	78624
63	123760
64	31824
65	75582
66	0
67	16796

[1, 0, 1, 1, 0, 2, 1, 5, 0, 5, 4, 6, 21, 0, 14, 8, 35, 28, 84, 0, 42, 25, 80, 216, 120, 330, 0, 132, 64, 309, 540, 1155, 495, 1287, 0, 429, 191, 890, 2475, 3080, 5720, 2002, 5005, 0, 1430, 540, 3058, 7788, 16302, 16016, 27027, 8008, 19448, 0, 4862, 1616, 9580, 30108, 54964, 96005, 78624, 123760, 31824, 75582, 0, 16796]

cp's OEIS Frontend

A090985 Triangle read by rows: T(n,k) is the number of dissections of a convex n-gon by nonintersecting diagonals, having exactly k triangles (n >= 2, k >= 0).

Table of values

List of values