A307804 - cp's OEIS frontend

A307804 Triangle T(n,k) read by rows: number of labeled 2-regular digraphs (multiple arcs and loops allowed) on n nodes with k components.

n	a(n)
0	1
1	0
2	1
3	0
4	2
5	1
6	0
7	14
8	6
9	1
10	0
11	201
12	68
13	12
14	1
15	0
16	4704
17	1285
18	200
19	20
20	1
21	0
22	160890
23	36214
24	4815
25	460
26	30
27	1
28	0
29	7538040
30	1422288
31	160594
32	13755
33	910
34	42
35	1
36	0
37	462869190
38	74416131
39	7151984
40	535864
41	33110
42	1624
43	56
44	1
45	0
46	36055948320
47	5016901734
48	413347787
49	26821368
50	1490664
51	70686
52	2688
53	72
54	1

[1, 0, 1, 0, 2, 1, 0, 14, 6, 1, 0, 201, 68, 12, 1, 0, 4704, 1285, 200, 20, 1, 0, 160890, 36214, 4815, 460, 30, 1, 0, 7538040, 1422288, 160594, 13755, 910, 42, 1, 0, 462869190, 74416131, 7151984, 535864, 33110, 1624, 56, 1, 0, 36055948320, 5016901734, 413347787, 26821368, 1490664, 70686, 2688, 72, 1]

cp's OEIS Frontend

A307804 Triangle T(n,k) read by rows: number of labeled 2-regular digraphs (multiple arcs and loops allowed) on n nodes with k components.

Table of values

List of values