A210664 - cp's OEIS frontend

A210664 Square array read by upwards antidiagonals: T(m,n) is the number of simple 3-connected triangulations of a closed region in the plane with m+3 given external edges and 3n+m internal edges, m>=0, n>=1.

n	a(n)
0	1
1	1
2	0
3	1
4	2
5	1
6	1
7	5
8	6
9	3
10	1
11	9
12	20
13	22
14	12
15	1
16	14
17	50
18	85
19	91
20	52
21	1
22	20
23	105
24	254
25	385
26	408
27	241
28	1
29	27
30	196
31	644
32	1287
33	1836
34	1938
35	1173
36	1
37	35
38	336
39	1448
40	3696
41	6630
42	9120
43	9614
44	5929
45	1
46	44
47	540
48	2967
49	9468
50	20790
51	34846
52	46805
53	49335
54	30880

[1, 1, 0, 1, 2, 1, 1, 5, 6, 3, 1, 9, 20, 22, 12, 1, 14, 50, 85, 91, 52, 1, 20, 105, 254, 385, 408, 241, 1, 27, 196, 644, 1287, 1836, 1938, 1173, 1, 35, 336, 1448, 3696, 6630, 9120, 9614, 5929, 1, 44, 540, 2967, 9468, 20790, 34846, 46805, 49335, 30880]

cp's OEIS Frontend

A210664 Square array read by upwards antidiagonals: T(m,n) is the number of simple 3-connected triangulations of a closed region in the plane with m+3 given external edges and 3n+m internal edges, m>=0, n>=1.

Table of values

List of values