A228315 - cp's OEIS frontend

A228315 Triangular array read by rows: T(n,k) is the number of rooted labeled simple graphs on {1,2,...,n} such that the root is in a component of size k; n>=1, 1<=k<=n.

n	a(n)
1	1
2	2
3	2
4	6
5	6
6	12
7	32
8	24
9	48
10	152
11	320
12	160
13	240
14	760
15	3640
16	6144
17	1920
18	1920
19	4560
20	21840
21	160224
22	229376
23	43008
24	26880
25	42560
26	152880
27	1121568
28	13063792
29	16777216
30	1835008
31	688128
32	680960
33	1630720
34	8972544
35	104510336
36	2012388736

[1, 2, 2, 6, 6, 12, 32, 24, 48, 152, 320, 160, 240, 760, 3640, 6144, 1920, 1920, 4560, 21840, 160224, 229376, 43008, 26880, 42560, 152880, 1121568, 13063792, 16777216, 1835008, 688128, 680960, 1630720, 8972544, 104510336, 2012388736]

cp's OEIS Frontend

A228315 Triangular array read by rows: T(n,k) is the number of rooted labeled simple graphs on {1,2,...,n} such that the root is in a component of size k; n>=1, 1<=k<=n.

Table of values

List of values