A089434 - cp's OEIS frontend

A089434 Triangle read by rows: T(n,k) (n >= 2, k >= 0) is the number of non-crossing connected graphs on n nodes on a circle, having k interior faces. Rows are indexed 2,3,4,...; columns are indexed 0,1,2,....

n	a(n)
2	1
3	3
4	1
5	12
6	9
7	2
8	55
9	66
10	30
11	5
12	273
13	455
14	315
15	105
16	14
17	1428
18	3060
19	2856
20	1428
21	378
22	42
23	7752
24	20349
25	23940
26	15960
27	6300
28	1386
29	132
30	43263
31	134596
32	191268
33	159390
34	83490
35	27324
36	5148
37	429
38	246675
39	888030
40	1480050
41	1480050
42	965250
43	418275
44	117117

[1, 3, 1, 12, 9, 2, 55, 66, 30, 5, 273, 455, 315, 105, 14, 1428, 3060, 2856, 1428, 378, 42, 7752, 20349, 23940, 15960, 6300, 1386, 132, 43263, 134596, 191268, 159390, 83490, 27324, 5148, 429, 246675, 888030, 1480050, 1480050, 965250, 418275, 117117]

cp's OEIS Frontend

A089434 Triangle read by rows: T(n,k) (n >= 2, k >= 0) is the number of non-crossing connected graphs on n nodes on a circle, having k interior faces. Rows are indexed 2,3,4,...; columns are indexed 0,1,2,....

Table of values

List of values