A126749 - cp's OEIS frontend

A126749 Triangle read by rows: T(n,k) (n>=2, k=0..n-1) gives number of biconnected graphs on n nodes with chromatic number n-k.

n	a(n)
2	0
3	1
4	0
5	1
6	1
7	1
8	1
9	2
10	6
11	1
12	1
13	3
14	17
15	30
16	5
17	1
18	4
19	34
20	189
21	232
22	8
23	1
24	5
25	59
26	627
27	3627
28	2762
29	42
30	1
31	6
32	92
33	1631
34	23262
35	118114
36	50814
37	146
38	1
39	7
40	135
41	3643
42	101409
43	1686975
44	6530233
45	1420183
46	956

[0, 1, 0, 1, 1, 1, 1, 2, 6, 1, 1, 3, 17, 30, 5, 1, 4, 34, 189, 232, 8, 1, 5, 59, 627, 3627, 2762, 42, 1, 6, 92, 1631, 23262, 118114, 50814, 146, 1, 7, 135, 3643, 101409, 1686975, 6530233, 1420183, 956]

cp's OEIS Frontend

A126749 Triangle read by rows: T(n,k) (n>=2, k=0..n-1) gives number of biconnected graphs on n nodes with chromatic number n-k.

Table of values

List of values