A091958 - cp's OEIS frontend

A091958 Triangle read by rows: T(n,k)=number of ordered trees with n edges and k branch nodes at odd height.

n	a(n)
0	1
1	1
2	2
3	4
4	1
5	9
6	5
7	21
8	21
9	51
10	78
11	3
12	127
13	274
14	28
15	323
16	927
17	180
18	835
19	3061
20	954
21	12
22	2188
23	9933
24	4510
25	165
26	5798
27	31824
28	19734
29	1430
30	15511
31	100972
32	81684
33	9790
34	55
35	41835
36	317942
37	324246
38	57876
39	1001
40	113634
41	995088
42	1245762
43	309036
44	10920

[1, 1, 2, 4, 1, 9, 5, 21, 21, 51, 78, 3, 127, 274, 28, 323, 927, 180, 835, 3061, 954, 12, 2188, 9933, 4510, 165, 5798, 31824, 19734, 1430, 15511, 100972, 81684, 9790, 55, 41835, 317942, 324246, 57876, 1001, 113634, 995088, 1245762, 309036, 10920]

cp's OEIS Frontend

A091958 Triangle read by rows: T(n,k)=number of ordered trees with n edges and k branch nodes at odd height.

Table of values

List of values