A350447 - cp's OEIS frontend

A350447 Triangle read by rows: T(n,k) is the number of acyclic digraphs on n unlabeled nodes with k arcs, n >=0, k = 0..(n-1)*n/2.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	3
7	1
8	1
9	1
10	4
11	9
12	9
13	6
14	1
15	1
16	1
17	4
18	12
19	37
20	60
21	80
22	63
23	33
24	10
25	1
26	1
27	1
28	4
29	13
30	51
31	163
32	407
33	796
34	1169
35	1291
36	1057
37	649
38	281
39	85
40	15
41	1
42	1
43	1
44	4
45	13
46	54
47	215
48	846
49	2690
50	7253
51	15703
52	27596
53	39057
54	44902
55	41723
56	31336
57	18844
58	8983
59	3325
60	920
61	180
62	21
63	1

[1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 4, 9, 9, 6, 1, 1, 1, 4, 12, 37, 60, 80, 63, 33, 10, 1, 1, 1, 4, 13, 51, 163, 407, 796, 1169, 1291, 1057, 649, 281, 85, 15, 1, 1, 1, 4, 13, 54, 215, 846, 2690, 7253, 15703, 27596, 39057, 44902, 41723, 31336, 18844, 8983, 3325, 920, 180, 21, 1]

cp's OEIS Frontend

A350447 Triangle read by rows: T(n,k) is the number of acyclic digraphs on n unlabeled nodes with k arcs, n >=0, k = 0..(n-1)*n/2.

Table of values

List of values