A198336 - cp's OEIS frontend

A198336 Irregular triangle read by rows: row n is the sequence of Matula-Goebel numbers of the rooted trees obtained from the rooted tree with Matula-Goebel number n by pruning it successively 0,1,2,... times. The operation of pruning consists of the removal of the vertices of degree one, together with their incident vertices.

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

[1, 2, 1, 3, 1, 4, 1, 5, 2, 1, 6, 2, 1, 7, 1, 8, 1, 9, 4, 1, 10, 3, 1, 11, 3, 1, 12, 2, 1, 13, 2, 1, 14, 2, 1, 15, 6, 2, 1, 16, 1, 17, 2, 1, 18, 4, 1, 19, 1, 20, 3, 1, 21, 4, 1, 22, 5, 2, 1, 23, 4, 1, 24, 2, 1, 25, 9, 4, 1, 26, 3, 1, 27, 8, 1, 28, 2, 1, 29, 3, 1]

cp's OEIS Frontend

Table of values

List of values

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

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

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