A257540 - cp's OEIS frontend

A257540 Irregular triangle read by rows: row n (n>=2) contains the degrees of the level 1 vertices of the rooted tree having Matula-Goebel number n; row 1: 0.

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

[0, 1, 2, 1, 1, 2, 1, 2, 3, 1, 1, 1, 2, 2, 1, 2, 2, 1, 1, 2, 3, 1, 3, 2, 2, 1, 1, 1, 1, 2, 1, 2, 2, 4, 1, 1, 2, 2, 3, 1, 2, 3, 1, 1, 1, 2, 2, 2, 1, 3, 2, 2, 2, 1, 1, 3, 3, 1, 2, 2, 2, 1, 1, 1, 1, 1, 2, 2, 1, 2, 2, 3, 1, 1, 2, 2, 4, 1, 4, 2, 3, 1, 1]

cp's OEIS Frontend

A257540 Irregular triangle read by rows: row n (n>=2) contains the degrees of the level 1 vertices of the rooted tree having Matula-Goebel number n; row 1: 0.

Table of values

List of values

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

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

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