A380306 - cp's OEIS frontend

A380306 Irregular triangle read by rows: T(n,k) is the number of rooted binary normal unlabeled galled trees with n leaves and exactly k galls, 0 <= k <= floor((n-1)/2).

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	4
7	3
8	15
9	2
10	6
11	48
12	18
13	11
14	148
15	107
16	6
17	23
18	435
19	528
20	78
21	46
22	1250
23	2295
24	661
25	19
26	98
27	3512
28	9185
29	4356
30	346
31	207
32	9726
33	34503
34	24564
35	3776
36	67
37	451
38	26587
39	123612
40	123825
41	31289
42	1543
43	983
44	71975
45	426218
46	574149
47	216501
48	20720
49	246

[1, 1, 1, 1, 2, 4, 3, 15, 2, 6, 48, 18, 11, 148, 107, 6, 23, 435, 528, 78, 46, 1250, 2295, 661, 19, 98, 3512, 9185, 4356, 346, 207, 9726, 34503, 24564, 3776, 67, 451, 26587, 123612, 123825, 31289, 1543, 983, 71975, 426218, 574149, 216501, 20720, 246]

cp's OEIS Frontend

A380306 Irregular triangle read by rows: T(n,k) is the number of rooted binary normal unlabeled galled trees with n leaves and exactly k galls, 0 <= k <= floor((n-1)/2).

Table of values

List of values