A223894 - cp's OEIS frontend

A223894 Triangular array read by rows: T(n,k) is the number of connected components with size k summed over all simple labeled graphs on n nodes; n>=1, 1<=k<=n.

n	a(n)
1	1
2	2
3	1
4	6
5	3
6	4
7	32
8	12
9	16
10	38
11	320
12	80
13	80
14	190
15	728
16	6144
17	960
18	640
19	1140
20	4368
21	26704
22	229376
23	21504
24	8960
25	10640
26	30576
27	186928
28	1866256
29	16777216
30	917504
31	229376
32	170240
33	326144
34	1495424
35	14930048
36	251548592
37	2415919104
38	75497472
39	11010048
40	4902912
41	5870592
42	17945088
43	134370432
44	2263937328
45	66296291072

[1, 2, 1, 6, 3, 4, 32, 12, 16, 38, 320, 80, 80, 190, 728, 6144, 960, 640, 1140, 4368, 26704, 229376, 21504, 8960, 10640, 30576, 186928, 1866256, 16777216, 917504, 229376, 170240, 326144, 1495424, 14930048, 251548592, 2415919104, 75497472, 11010048, 4902912, 5870592, 17945088, 134370432, 2263937328, 66296291072]

cp's OEIS Frontend

A223894 Triangular array read by rows: T(n,k) is the number of connected components with size k summed over all simple labeled graphs on n nodes; n>=1, 1<=k<=n.

Table of values

List of values