A057275 - cp's OEIS frontend

A057275 Triangle T(n,k) of number of unilaterally connected digraphs on n labeled nodes and with k arcs, k=0..n*(n-1).

n	a(n)
1	1
2	0
3	2
4	1
5	0
6	0
7	6
8	20
9	15
10	6
11	1
12	0
13	0
14	0
15	24
16	222
17	660
18	908
19	792
20	495
21	220
22	66
23	12
24	1
25	0
26	0
27	0
28	0
29	120
30	2304
31	15540
32	52700
33	109545
34	161120
35	182946
36	167660
37	125945
38	77520
39	38760
40	15504
41	4845
42	1140
43	190
44	20
45	1

[1, 0, 2, 1, 0, 0, 6, 20, 15, 6, 1, 0, 0, 0, 24, 222, 660, 908, 792, 495, 220, 66, 12, 1, 0, 0, 0, 0, 120, 2304, 15540, 52700, 109545, 161120, 182946, 167660, 125945, 77520, 38760, 15504, 4845, 1140, 190, 20, 1]

cp's OEIS Frontend

A057275 Triangle T(n,k) of number of unilaterally connected digraphs on n labeled nodes and with k arcs, k=0..n*(n-1).

Table of values

List of values