A115597 - cp's OEIS frontend

A115597 Triangle read by rows: let a(n,k) = number of graphs on n nodes with chromatic number k; T(n,k) = a(n,n-k), n >= 2, k=0..n-2.

n	a(n)
2	1
3	1
4	2
5	1
6	3
7	6
8	1
9	4
10	16
11	12
12	1
13	5
14	31
15	84
16	34
17	1
18	6
19	52
20	318
21	579
22	87
23	1
24	7
25	81
26	867
27	5366
28	5721
29	302
30	1
31	8
32	118
33	2028
34	28722
35	155291
36	87381
37	1118
38	1
39	9
40	165
41	4251
42	115391
43	1919895
44	7855628
45	2104349
46	5478

[1, 1, 2, 1, 3, 6, 1, 4, 16, 12, 1, 5, 31, 84, 34, 1, 6, 52, 318, 579, 87, 1, 7, 81, 867, 5366, 5721, 302, 1, 8, 118, 2028, 28722, 155291, 87381, 1118, 1, 9, 165, 4251, 115391, 1919895, 7855628, 2104349, 5478]

cp's OEIS Frontend

A115597 Triangle read by rows: let a(n,k) = number of graphs on n nodes with chromatic number k; T(n,k) = a(n,n-k), n >= 2, k=0..n-2.

Table of values

List of values