A368924 - cp's OEIS frontend

A368924 Triangle read by rows where T(n,k) is the number of labeled loop-graphs on n vertices with k loops and n-k non-loops such that it is possible to choose a different vertex from each edge.

n	a(n)
0	1
1	0
2	1
3	0
4	2
5	1
6	1
7	9
8	6
9	1
10	15
11	68
12	48
13	12
14	1
15	222
16	720
17	510
18	150
19	20
20	1
21	3670
22	9738
23	6825
24	2180
25	360
26	30
27	1
28	68820
29	159628
30	110334
31	36960
32	6895
33	735
34	42
35	1
36	1456875
37	3067320
38	2090760
39	721560
40	145530
41	17976
42	1344
43	56
44	1
45	34506640
46	67512798
47	45422928
48	15989232
49	3402756
50	463680
51	40908
52	2268
53	72
54	1

[1, 0, 1, 0, 2, 1, 1, 9, 6, 1, 15, 68, 48, 12, 1, 222, 720, 510, 150, 20, 1, 3670, 9738, 6825, 2180, 360, 30, 1, 68820, 159628, 110334, 36960, 6895, 735, 42, 1, 1456875, 3067320, 2090760, 721560, 145530, 17976, 1344, 56, 1, 34506640, 67512798, 45422928, 15989232, 3402756, 463680, 40908, 2268, 72, 1]

cp's OEIS Frontend

A368924 Triangle read by rows where T(n,k) is the number of labeled loop-graphs on n vertices with k loops and n-k non-loops such that it is possible to choose a different vertex from each edge.

Table of values

List of values