A095693 - cp's OEIS frontend

A095693 Triangle read by rows: T(n,k) is the number of multigraphs without loops on n labeled nodes with k edges and maximum degree 2.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	1
6	1
7	3
8	6
9	1
10	1
11	6
12	21
13	22
14	6
15	1
16	10
17	55
18	130
19	130
20	22
21	1
22	15
23	120
24	485
25	1005
26	822
27	130
28	1
29	21
30	231
31	1400
32	4830
33	8547
34	6202
35	822
36	1
37	28
38	406
39	3416
40	17465
41	52052
42	81676
43	52552
44	6202
45	1
46	36
47	666
48	7392
49	52101
50	230832
51	610932
52	859932
53	499194
54	52552

[1, 1, 0, 1, 1, 1, 1, 3, 6, 1, 1, 6, 21, 22, 6, 1, 10, 55, 130, 130, 22, 1, 15, 120, 485, 1005, 822, 130, 1, 21, 231, 1400, 4830, 8547, 6202, 822, 1, 28, 406, 3416, 17465, 52052, 81676, 52552, 6202, 1, 36, 666, 7392, 52101, 230832, 610932, 859932, 499194, 52552]

cp's OEIS Frontend

A095693 Triangle read by rows: T(n,k) is the number of multigraphs without loops on n labeled nodes with k edges and maximum degree 2.

Table of values

List of values