A212618 - cp's OEIS frontend

A212618 Sum of the distances between all unordered pairs of vertices of degree 2 in the rooted tree with Matula-Goebel number n.

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	0
8	0
9	4
10	4
11	4
12	0
13	0
14	0
15	10
16	0
17	0
18	2
19	0
20	1
21	1
22	10
23	2
24	0
25	20
26	2
27	6
28	0
29	1
30	6
31	10
32	0
33	20
34	1
35	4
36	2
37	0
38	0
39	6
40	1
41	2
42	0
43	0
44	4
45	13
46	6
47	6
48	0
49	0
50	14
51	4
52	0
53	0
54	6
55	35
56	0
57	1
58	6
59	1
60	6
61	2
62	20
63	2
64	0
65	13
66	13
67	0
68	0
69	13
70	1
71	1
72	2
73	0
74	2
75	24
76	0
77	10
78	3
79	4
80	1
81	12
82	6
83	6
84	0
85	10
86	0
87	14
88	4
89	0
90	13
91	2
92	2
93	35
94	13

[0, 0, 0, 0, 1, 1, 0, 0, 4, 4, 4, 0, 0, 0, 10, 0, 0, 2, 0, 1, 1, 10, 2, 0, 20, 2, 6, 0, 1, 6, 10, 0, 20, 1, 4, 2, 0, 0, 6, 1, 2, 0, 0, 4, 13, 6, 6, 0, 0, 14, 4, 0, 0, 6, 35, 0, 1, 6, 1, 6, 2, 20, 2, 0, 13, 13, 0, 0, 13, 1, 1, 2, 0, 2, 24, 0, 10, 3, 4, 1, 12, 6, 6, 0, 10, 0, 14, 4, 0, 13, 2, 2, 35, 13]

cp's OEIS Frontend

A212618 Sum of the distances between all unordered pairs of vertices of degree 2 in the rooted tree with Matula-Goebel number n.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	0
8	0
9	4
10	4
11	4
12	0
13	0
14	0
15	10
16	0
17	0
18	2
19	0
20	1
21	1
22	10
23	2
24	0
25	20
26	2
27	6
28	0
29	1
30	6
31	10
32	0
33	20
34	1
35	4
36	2
37	0
38	0
39	6
40	1
41	2
42	0
43	0
44	4
45	13
46	6
47	6
48	0
49	0
50	14
51	4
52	0
53	0
54	6
55	35
56	0
57	1
58	6
59	1
60	6
61	2
62	20
63	2
64	0
65	13
66	13
67	0
68	0
69	13
70	1
71	1
72	2
73	0
74	2
75	24
76	0
77	10
78	3
79	4
80	1
81	12
82	6
83	6
84	0
85	10
86	0
87	14
88	4
89	0
90	13
91	2
92	2
93	35
94	13

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	0
8	0
9	4
10	4
11	4
12	0
13	0
14	0
15	10
16	0
17	0
18	2
19	0
20	1
21	1
22	10
23	2
24	0
25	20
26	2
27	6
28	0
29	1
30	6
31	10
32	0
33	20
34	1
35	4
36	2
37	0
38	0
39	6
40	1
41	2
42	0
43	0
44	4
45	13
46	6
47	6
48	0
49	0
50	14
51	4
52	0
53	0
54	6
55	35
56	0
57	1
58	6
59	1
60	6
61	2
62	20
63	2
64	0
65	13
66	13
67	0
68	0
69	13
70	1
71	1
72	2
73	0
74	2
75	24
76	0
77	10
78	3
79	4
80	1
81	12
82	6
83	6
84	0
85	10
86	0
87	14
88	4
89	0
90	13
91	2
92	2
93	35
94	13

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	0
8	0
9	4
10	4
11	4
12	0
13	0
14	0
15	10
16	0
17	0
18	2
19	0
20	1
21	1
22	10
23	2
24	0
25	20
26	2
27	6
28	0
29	1
30	6
31	10
32	0
33	20
34	1
35	4
36	2
37	0
38	0
39	6
40	1
41	2
42	0
43	0
44	4
45	13
46	6
47	6
48	0
49	0
50	14
51	4
52	0
53	0
54	6
55	35
56	0
57	1
58	6
59	1
60	6
61	2
62	20
63	2
64	0
65	13
66	13
67	0
68	0
69	13
70	1
71	1
72	2
73	0
74	2
75	24
76	0
77	10
78	3
79	4
80	1
81	12
82	6
83	6
84	0
85	10
86	0
87	14
88	4
89	0
90	13
91	2
92	2
93	35
94	13