A206491 - cp's OEIS frontend

A206491 Irregular triangle read by rows: T(n,k) is the number of root subtrees with k nodes in the rooted tree having Matula-Goebel number n.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	1
10	1
11	1
12	1
13	1
14	1
15	2
16	2
17	1
18	1
19	1
20	2
21	1
22	1
23	3
24	3
25	1
26	1
27	2
28	3
29	2
30	1
31	1
32	2
33	2
34	2
35	1
36	1
37	1
38	1
39	1
40	1
41	1
42	3
43	4
44	3
45	1
46	1
47	1
48	2
49	2
50	1
51	1
52	2
53	3
54	3
55	1
56	1
57	2
58	3
59	3
60	2
61	1
62	1
63	4
64	6
65	4
66	1
67	1
68	1
69	1
70	2
71	1
72	1
73	3
74	5
75	5
76	3
77	1
78	1
79	1
80	3
81	3
82	1
83	1
84	3
85	4
86	4
87	3
88	1
89	1
90	2
91	4
92	4
93	3
94	1
95	1
96	2
97	2
98	2
99	2
100	1
101	1
102	1
103	2
104	3
105	2
106	1
107	1
108	4
109	7
110	7
111	4
112	1

[1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 2, 3, 2, 1, 1, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 3, 4, 3, 1, 1, 1, 2, 2, 1, 1, 2, 3, 3, 1, 1, 2, 3, 3, 2, 1, 1, 4, 6, 4, 1, 1, 1, 1, 2, 1, 1, 3, 5, 5, 3, 1, 1, 1, 3, 3, 1, 1, 3, 4, 4, 3, 1, 1, 2, 4, 4, 3, 1, 1, 2, 2, 2, 2, 1, 1, 1, 2, 3, 2, 1, 1, 4, 7, 7, 4, 1]

cp's OEIS Frontend

A206491 Irregular triangle read by rows: T(n,k) is the number of root subtrees with k nodes in the rooted tree having Matula-Goebel number n.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	1
10	1
11	1
12	1
13	1
14	1
15	2
16	2
17	1
18	1
19	1
20	2
21	1
22	1
23	3
24	3
25	1
26	1
27	2
28	3
29	2
30	1
31	1
32	2
33	2
34	2
35	1
36	1
37	1
38	1
39	1
40	1
41	1
42	3
43	4
44	3
45	1
46	1
47	1
48	2
49	2
50	1
51	1
52	2
53	3
54	3
55	1
56	1
57	2
58	3
59	3
60	2
61	1
62	1
63	4
64	6
65	4
66	1
67	1
68	1
69	1
70	2
71	1
72	1
73	3
74	5
75	5
76	3
77	1
78	1
79	1
80	3
81	3
82	1
83	1
84	3
85	4
86	4
87	3
88	1
89	1
90	2
91	4
92	4
93	3
94	1
95	1
96	2
97	2
98	2
99	2
100	1
101	1
102	1
103	2
104	3
105	2
106	1
107	1
108	4
109	7
110	7
111	4
112	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	1
10	1
11	1
12	1
13	1
14	1
15	2
16	2
17	1
18	1
19	1
20	2
21	1
22	1
23	3
24	3
25	1
26	1
27	2
28	3
29	2
30	1
31	1
32	2
33	2
34	2
35	1
36	1
37	1
38	1
39	1
40	1
41	1
42	3
43	4
44	3
45	1
46	1
47	1
48	2
49	2
50	1
51	1
52	2
53	3
54	3
55	1
56	1
57	2
58	3
59	3
60	2
61	1
62	1
63	4
64	6
65	4
66	1
67	1
68	1
69	1
70	2
71	1
72	1
73	3
74	5
75	5
76	3
77	1
78	1
79	1
80	3
81	3
82	1
83	1
84	3
85	4
86	4
87	3
88	1
89	1
90	2
91	4
92	4
93	3
94	1
95	1
96	2
97	2
98	2
99	2
100	1
101	1
102	1
103	2
104	3
105	2
106	1
107	1
108	4
109	7
110	7
111	4
112	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	1
10	1
11	1
12	1
13	1
14	1
15	2
16	2
17	1
18	1
19	1
20	2
21	1
22	1
23	3
24	3
25	1
26	1
27	2
28	3
29	2
30	1
31	1
32	2
33	2
34	2
35	1
36	1
37	1
38	1
39	1
40	1
41	1
42	3
43	4
44	3
45	1
46	1
47	1
48	2
49	2
50	1
51	1
52	2
53	3
54	3
55	1
56	1
57	2
58	3
59	3
60	2
61	1
62	1
63	4
64	6
65	4
66	1
67	1
68	1
69	1
70	2
71	1
72	1
73	3
74	5
75	5
76	3
77	1
78	1
79	1
80	3
81	3
82	1
83	1
84	3
85	4
86	4
87	3
88	1
89	1
90	2
91	4
92	4
93	3
94	1
95	1
96	2
97	2
98	2
99	2
100	1
101	1
102	1
103	2
104	3
105	2
106	1
107	1
108	4
109	7
110	7
111	4
112	1