A214571 - cp's OEIS frontend

A214571 Irregular triangle read by rows: T(n,k) is the number of ordered trees having n vertices and isomorphic (as rooted trees) to k ordered trees (n >= 1, k >= 1).

n	a(n)
1	1
2	1
3	2
4	3
5	2
6	5
7	6
8	3
9	6
10	16
11	12
12	8
13	10
14	34
15	21
16	32
17	5
18	30
19	11
20	68
21	48
22	100
23	15
24	108
25	0
26	24
27	9
28	10
29	0
30	36
31	16
32	126
33	81
34	260
35	30
36	336
37	7
38	128
39	45
40	40
41	0
42	264
43	0
44	0
45	15
46	0
47	0
48	18
49	0
50	40
51	0
52	0
53	0
54	24
55	19
56	222
57	141
58	616
59	60
60	828
61	21
62	520
63	117
64	130
65	0
66	1140
67	0
68	0
69	45
70	80
71	0
72	234
73	0
74	160
75	21
76	0
77	0
78	312
79	0
80	0
81	0
82	0
83	0
84	120
85	0
86	0
87	0
88	0
89	0
90	36
91	0
92	0
93	0
94	40
95	26
96	372
97	219
98	1392
99	90
100	1914
101	42
102	1664
103	315
104	320
105	0
106	3696
107	0
108	28
109	195
110	544
111	0
112	1044
113	0
114	580
115	21
116	0
117	0
118	2112
119	0
120	0
121	27
122	28
123	0
124	480
125	0
126	0
127	0
128	0
129	35
130	648
131	0
132	0
133	0
134	320
135	0
136	84
137	0
138	0
139	0
140	0
141	0
142	240
143	0
144	0
145	0
146	0
147	0
148	0
149	0
150	0
151	0
152	0
153	0
154	360

[1, 1, 2, 3, 2, 5, 6, 3, 6, 16, 12, 8, 10, 34, 21, 32, 5, 30, 11, 68, 48, 100, 15, 108, 0, 24, 9, 10, 0, 36, 16, 126, 81, 260, 30, 336, 7, 128, 45, 40, 0, 264, 0, 0, 15, 0, 0, 18, 0, 40, 0, 0, 0, 24, 19, 222, 141, 616, 60, 828, 21, 520, 117, 130, 0, 1140, 0, 0, 45, 80, 0, 234, 0, 160, 21, 0, 0, 312, 0, 0, 0, 0, 0, 120, 0, 0, 0, 0, 0, 36, 0, 0, 0, 40, 26, 372, 219, 1392, 90, 1914, 42, 1664, 315, 320, 0, 3696, 0, 28, 195, 544, 0, 1044, 0, 580, 21, 0, 0, 2112, 0, 0, 27, 28, 0, 480, 0, 0, 0, 0, 35, 648, 0, 0, 0, 320, 0, 84, 0, 0, 0, 0, 0, 240, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 360]

cp's OEIS Frontend

A214571 Irregular triangle read by rows: T(n,k) is the number of ordered trees having n vertices and isomorphic (as rooted trees) to k ordered trees (n >= 1, k >= 1).

Table of values

List of values