A304489 - cp's OEIS frontend

A304489 Triangle read by rows: T(n,k) = number of rooted signed trees with n nodes and k positive edges (0 <= k < n).

n	a(n)
1	1
2	1
3	1
4	2
5	3
6	2
7	4
8	9
9	9
10	4
11	9
12	26
13	37
14	26
15	9
16	20
17	75
18	134
19	134
20	75
21	20
22	48
23	214
24	469
25	596
26	469
27	214
28	48
29	115
30	612
31	1577
32	2445
33	2445
34	1577
35	612
36	115
37	286
38	1747
39	5204
40	9480
41	11513
42	9480
43	5204
44	1747
45	286
46	719
47	4995
48	16865
49	35357
50	50363
51	50363
52	35357
53	16865
54	4995
55	719

[1, 1, 1, 2, 3, 2, 4, 9, 9, 4, 9, 26, 37, 26, 9, 20, 75, 134, 134, 75, 20, 48, 214, 469, 596, 469, 214, 48, 115, 612, 1577, 2445, 2445, 1577, 612, 115, 286, 1747, 5204, 9480, 11513, 9480, 5204, 1747, 286, 719, 4995, 16865, 35357, 50363, 50363, 35357, 16865, 4995, 719]

cp's OEIS Frontend

A304489 Triangle read by rows: T(n,k) = number of rooted signed trees with n nodes and k positive edges (0 <= k < n).

Table of values

List of values