A089435 - cp's OEIS frontend

A089435 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 triangles. Rows are indexed 2,3,4,...; columns are indexed 0,1,2,....

n	a(n)
2	1
3	3
4	1
5	13
6	8
7	2
8	66
9	60
10	25
11	5
12	367
13	442
14	255
15	84
16	14
17	2164
18	3248
19	2380
20	1064
21	294
22	42
23	13293
24	23904
25	21192
26	11832
27	4410
28	1056
29	132
30	84157
31	176397
32	183303
33	122115
34	56430
35	18216
36	3861
37	429
38	545270
39	1305480
40	1554850
41	1200320
42	657195
43	262262
44	75075

[1, 3, 1, 13, 8, 2, 66, 60, 25, 5, 367, 442, 255, 84, 14, 2164, 3248, 2380, 1064, 294, 42, 13293, 23904, 21192, 11832, 4410, 1056, 132, 84157, 176397, 183303, 122115, 56430, 18216, 3861, 429, 545270, 1305480, 1554850, 1200320, 657195, 262262, 75075]

cp's OEIS Frontend

A089435 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 triangles. Rows are indexed 2,3,4,...; columns are indexed 0,1,2,....

Table of values

List of values