A368928 - cp's OEIS frontend

A368928 Triangle read by rows where T(n,k) is the number of labeled loop-graphs with n vertices and n edges, k of which are loops.

n	a(n)
0	1
1	0
2	1
3	0
4	2
5	1
6	1
7	9
8	9
9	1
10	15
11	80
12	90
13	24
14	1
15	252
16	1050
17	1200
18	450
19	50
20	1
21	5005
22	18018
23	20475
24	9100
25	1575
26	90
27	1
28	116280
29	379848
30	427329
31	209475
32	46550
33	4410
34	147
35	1
36	3108105
37	9472320
38	10548720
39	5503680
40	1433250
41	183456
42	10584
43	224
44	1

[1, 0, 1, 0, 2, 1, 1, 9, 9, 1, 15, 80, 90, 24, 1, 252, 1050, 1200, 450, 50, 1, 5005, 18018, 20475, 9100, 1575, 90, 1, 116280, 379848, 427329, 209475, 46550, 4410, 147, 1, 3108105, 9472320, 10548720, 5503680, 1433250, 183456, 10584, 224, 1]

cp's OEIS Frontend

A368928 Triangle read by rows where T(n,k) is the number of labeled loop-graphs with n vertices and n edges, k of which are loops.

Table of values

List of values