A084268 - cp's OEIS frontend

A084268 Triangle read by rows: T(n,k) is the number of simple graphs on n unlabeled nodes having chromatic number k, 1 <= k <= n.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	6
9	3
10	1
11	1
12	12
13	16
14	4
15	1
16	1
17	34
18	84
19	31
20	5
21	1
22	1
23	87
24	579
25	318
26	52
27	6
28	1
29	1
30	302
31	5721
32	5366
33	867
34	81
35	7
36	1
37	1
38	1118
39	87381
40	155291
41	28722
42	2028
43	118
44	8
45	1
46	1
47	5478
48	2104349
49	7855628
50	1919895
51	115391
52	4251
53	165
54	9
55	1
56	1
57	32302
58	78315231
59	675054876
60	250530482
61	14662562
62	393963
63	8214
64	222
65	10
66	1

[1, 1, 1, 1, 2, 1, 1, 6, 3, 1, 1, 12, 16, 4, 1, 1, 34, 84, 31, 5, 1, 1, 87, 579, 318, 52, 6, 1, 1, 302, 5721, 5366, 867, 81, 7, 1, 1, 1118, 87381, 155291, 28722, 2028, 118, 8, 1, 1, 5478, 2104349, 7855628, 1919895, 115391, 4251, 165, 9, 1, 1, 32302, 78315231, 675054876, 250530482, 14662562, 393963, 8214, 222, 10, 1]

cp's OEIS Frontend

A084268 Triangle read by rows: T(n,k) is the number of simple graphs on n unlabeled nodes having chromatic number k, 1 <= k <= n.

Table of values

List of values