A122193 - cp's OEIS frontend

A122193 Triangle T(n,k) of number of loopless multigraphs with n labeled edges and k labeled vertices and without isolated vertices, n >= 1; 2 <= k <= 2*n.

n	a(n)
1	1
2	1
3	6
4	6
5	1
6	24
7	114
8	180
9	90
10	1
11	78
12	978
13	4320
14	8460
15	7560
16	2520
17	1
18	240
19	6810
20	63540
21	271170
22	604800
23	730800
24	453600
25	113400
26	1
27	726
28	43746
29	774000
30	6075900
31	25424280
32	61923960
33	90720000
34	78813000
35	37422000
36	7484400

[1, 1, 6, 6, 1, 24, 114, 180, 90, 1, 78, 978, 4320, 8460, 7560, 2520, 1, 240, 6810, 63540, 271170, 604800, 730800, 453600, 113400, 1, 726, 43746, 774000, 6075900, 25424280, 61923960, 90720000, 78813000, 37422000, 7484400]

cp's OEIS Frontend

A122193 Triangle T(n,k) of number of loopless multigraphs with n labeled edges and k labeled vertices and without isolated vertices, n >= 1; 2 <= k <= 2*n.

Table of values

List of values